It can seem strange to think of putting metal byproducts into a beautiful piece of glass, but it is super common to use a wide selection of additives and compounds to give glassware unique looks. Antique Slag Glass Lamp, 8 panel umbrella. The result is a material that lies somewhere between porcelain and glass. Slag glass is a type of opaque pressed glass that includes colorful streaks that create a marbled effect. Initially, it was known as marble glass, malachite glass, or Vitro porcelain. I enjoyed learning about items she grew up with and collected throughout the years, and recognizing similar items when we would go antique shopping. Slag glass was extremely popular when used to create lampshades. Topped by an Art Deco style marbled yellow art glass shade. Slag glass is a type of pressed glass that is known for its brilliant and vibrant colors. 4,089. Assuming you have a table lamp with a large painted glass shade, then your shade should measure as 14, 15, 15.5, 16, or 18 inches. Two glassmakers in Pennsylvania, Harry Northwood and Thomas Dugan, were the first to imitate slag glass by mixing two colors of glass together and forgoing the actual slag in 1902. Slag glass antiques will not simply have white streaks blended with another color, but possess a richer, deeper tone. Slag glass was originally created in the United Kingdom in the 1890s by adding this slag substance during the glass-making process. Consulting with a professional or experienced collector can help determine the approximate value of a particular piece of slag glass. However, stained glass will not have any of the milky-colored streaks that slag glass does. 1231A - 10 1/4 Alpha Art Glass Amber Vase Lamp. Examine the area under the burner, and look for a collar. Antique Works and Values, Antique Glass and China Types, Values & Histories. This glassy residue would vary in tint and colordepending on the minerals and chemicals used in steel production, resulting in a glossy, opaque, marbled effect. Some of these names can be used synonymously, but some of them have slightly different meanings that a serious collector should be aware of. They're easy to find, and make a colorful, decorative display in your home, offi, What Is Vaseline Glass? Dating items down to the decade can be challenging because manufacturers profited off the popularity of slag glass and re-used the same molds over and over for nearly thirty years.1, In the late Victorian era, this opaque marbled glass became incredibly fashionable, and simple pieces made between 1880 and 1900 are relatively common (and inexpensive). This is something people will often wonder about. Free shipping for many products! Shade measures 7 1/4" x 16 1/2". One of the most common applications of vintage slag glass is in lighting. The term mosaic glass is much more inclusive and includes these pieces that look like slag glass but dont actually contain any slag. Slag glass can come in a range of colors, including shades of green, brown, pink, blue, and purple. Shop at WAYFAIR This$13,464 pair of slag glass lampson Etsy is one example, along with this complete setfrom the Hilltop Steakhouse in the United States, being sold for an even $15k on eBay. It is hard to keep fragile glass intact for decades. Unsigned decorative glass items like compotes and vases tend to sell between $5 $50, even if they are from the 19th century. $1,200 Sale Price 14% Off . Original 1910-1920's slag glass lamp, shows one cracked glass REVERE Copper and slag glass lamp, its faceted shade with green LAMP SHADE - Leaded slag glass lamp shade, unsigned, with TABLE LAMP - A four panel, dark green slag glass lamp with VINTAGE SLAG GLASS LAMP All original wiring, Circa 1920s, Size: 22 Slag Glass Lamp, figural spelter base with couple. Estimate $400/600 Sold with Premium 258.30 Closed October 27, 2022 171. Most pieces are decorative in nature, sprucing up side tables and bookshelves. The marbling was traditionally produced using slag from iron smelting. Slag glass antique lamps sell between $200 and $2,000, and most of the value is in the light itself. Another common use for slag glass was for various lighting pieces. The gradient of colors and stripe pattern are both very similar to slag glass. Most antique slag items are brown, blue, green, or purple. 1235 - 8 1/2 Florentine White Moonstone Vase Lamp. 3. Vintage slag glass is most commonly found in brown or purple colors with white streaks, but you can also find plenty of green and blue as well. Set of four antique embossed brass hanging lamp socket covers, 3 3/4" in diameter overall. It is a rather nice example of lamps of this type and I would place a value of $300 to $400. Slag glass is often used as a catch-all term for any type of pressed glass that is opaque and colorful, but not all glass that fits this description is true slag glass. To test the texture, run your fingers over the surface of the glass. Your caramel slag glass paneled lamp dates from the 1910s through the 1920s. Est. This pattern looks like clouds or waves and can range from subtle to bold. A beautiful pieceno matter the age or valuehas the ability to brighten a room and add character to interior decor. The history of slag glass goes back to the late 1890s in Gateshead in the northeast of England. Mineral Identification Labels (#185769230073) o***l (1621) - Feedback left by . Hanging Slag Glass Lamp, ca. Grandmother's old lamp not "true" slag glass but still catches eye of appraiser to the tune of $300-$400. Remember, there is no right or wrong way to identify slag glass. 1. Assuming your lamp isn't marked, then we have to move onto other steps to figure out if it is authentic. The most popular colors of slag glass tend to be shades of green and blue, but they can also be found in red, yellow, lavender, brown, and even black. Learning how to identify and value this glass can help if you are looking to collect or just learn more about this interesting glassware. Work with a qualified appraiser to help you identify the manufacturer and type of slag glass antiques you have, including antique glass insulators, to determine the true market value. Slag glass is a term used to describe a type of colored pressed opaque glass made using the "slag" left over during the iron smelting process. The visual marbling of this slag is reminiscent of slag glass, however, the presence of actual slag in slag glass pieces depends on how it was created. Stidwill's Antiques. The value of vintage slag glass, as with any antique, will depend on the quality of its condition, time period, and most importantly, the manufacturer. I'm Stacy Jones and I love antiques! In this guide, we'll explore the history and characteristics of collectible slag glass lamps. Imperial Glass introduced its iridescent (carnival) glass line in 1909. I would say the lamp is from the 30's or 40's. glass glasses lamps marks plates. See the patent table below for details. One of the easiest ways to identify slag glass is by its marbled or swirled pattern. Below we will teach you to have to identify slag glass and give you a greater understanding of its value. Identification Tips & History Highlights, One of the most unusual types of antique glass that collectors can investigate, Vaseline glass is absolutely fascinating due to its color, history, and radioactive components. Vintage Lamps and Lighting. They moved across the Ohio River to Williamstown, West Virginia, and built a . These colors are created during the manufacturing process and can vary greatly from piece to piece. Hobnail glass was popular in Victorian times, then, it was called "dewdrop glass." When Fenton introduced it in 1939, it became a hit. Remember, being cautious and taking your time while identifying slag glass can help ensure you make a wise purchasing decision. Slag glass is no longer produced as it once was. Have you ever seen a piece of glass and wondered where it came from? This website uses cookies to improve your experience. Slag glass is named after silicate slag, a colorful material that is a byproduct of molten steel. Real slag glass will not have a solid color but rather a blended, marble look. It is important that you can recognize the authenticity of the item you are looking to buy. I have a vintage slag glass desk lamp with the mark cCco on the plate that holds the shade on. Popular slag glass lampshades shapes included mushroom, dome and flower petals. Malachite stones have wavy striping in a green-tinged milky white on top of a darker green. Original Tiffany Lamps employed this metallic finish on the resin base. Another early slag glass was the purple malachite glass by Sowerby, which was sold in the United States under the name "blackberries and cream." The light shining through the marbled color creates a really unique effect. Slag glass is also sometimes used to refer to marbled glass pieces that didnt technically use slag as an additive. Both beautiful and elegant in their own regard, stained and slag glass are actually completely different. Happy hunting! This color pattern led to the "brown malachite" and "brown marble" names. Become a national Fenton club member Fenton glassware prices 1. $40.00 shipping. Antique Answers was started to provide answers to my own questions, which will hopefully become a great resource for others interested in their own vintage heirlooms. 73- Important Duffner and Kimberly leaded lamp. Oftentimes the pieces labeled as variegated glass have more stripey streaks in contrast to the more organic swirls of a true marble pattern. This leads to marbling in the colors of the glass. The original slag glass is brown with creamy streaks, a similar pattern to how your cup of coffee looks when you first pour in milk or creamer. Rubber and vinyl coated wires were not used until the post-World War II era. The older it is, the higher in cost. Category 20th Century American Arts and Crafts Slag Glass Table Lamps Those who love, buy, or collect antiques will tell you that while price and value are important, they are really only half the battle. They also began producing opaque golden, creamy colored glass known as caramel slag that allowed the passage of enough light to give a room a soft, warm, golden ivory glow. This incredible glass. Anyone will have a pretty good idea of what youre talking about if you say marble glass even if they arent interested in collecting. Check the bottom or inside of an item for either a name or logo of a manufacturer. 10 Easy Steps on How to Identify Slag Glass Step 1: Look for a Marbled or Swirled Pattern One of the easiest ways to identify slag glass is by its marbled or swirled pattern. Quezal shades were often used in groups on a table lamp or chandelier. Happy collecting! The white marbling pattern on slag glass is a dead giveaway. Art nouveau floral filigree frame shade coloured glass reservoirs and clear glass chimneys, 90cm high/Provenance: Tidenham Manor a lantern, arts & crafts style green glass shade. blue marblised base with circular frosted glass shade, 27cm high spelter figure of a maiden with outstretched arms lying on a hollow art deco design base, single socket fixture, 10 3/4'' h. x 19'' x 8 1/4''. eBay (258) Magazine. Hanging Slag Glass Lamp, ca. If you're looking for a softer glow in your room, install an amber light bulb to create a warmer light. If youre still unsure if a piece is slag glass, consult with a professional or experienced collector for their opinion. Reach out to an expert 7. Although, the majority of slag glassware was created as decorative pieces. The marble should never be streaky and it should blend well with the color of the glass. I think the one c stands for a casting company. Take care not to break or damage the piece while examining it. 2002-2023 LoveToKnow Media. Slag glass lamps are one of the most sought-after items made of slag glass. Make an offer . Opalescent or iridescent glass can be worth more. The church is not only the city's most renowned landmark but also stands alongside Dresden's Church of Our Lady and St Michael's . Some famous makers include Tiffany Studios, Bradley Hubbard, and Handelwhose originals in good condition are very sought after. VINTAGE SLAG GLASS LAMP All original wiring, Slag Glass Lamp, figural spelter base with, FIGURAL SPELTER LAMP WITH MARBLED ART GLASS, TWO ANTIQUE CZECH GLASS FRUIT BASKET BOUDOIR, ART DECO NUDE FIGURAL LAMP: Cast spelter, FIGURAL SLAG GLASS TABLE LAMP: Patinated, A pair of figural spelter oil lamps, with, Victorian Figural Spelter Lamp of Lady holding. Hold the glass up to a light source, and you should be able to see the light passing through, albeit with a mottled or cloudy appearance. In your brief description you failed to mention condition or the presence or absence of any marks or numbers on the base of the lamp. "Slag glass" is a collectors' name for opaque pressed glass with coloured streaks, usually white and/or cream streaks like this brown bugle made by George Davidson's in the North East of England in the 1890's. The name derives from the belief that these colours were achieved by adding slag from iron smelting works to the glass. Tiffany . Slag glass producers mark their products with the companys initials or the companys logo. Metal issues or glass issues I may not see in the pictures. Discerning Victorian consumers resisted purchasing marbleized glass in some cases and preferred more decorative elements in crystal. Antique 1908 Bradely & Hubbard Slag Glass Lamp Signed B&H Arts & Crafts $425.00 $32.52 shipping or Best Offer SPONSORED Large Bradley Hubbard Colorful Slag Glass Shade & Base, Arts & Crafts, Handel Er $1,650.00 $95.00 shipping or Best Offer 14 watching SPONSORED Antique Brass Oil Kerosene Font B&H Bradley & Hubbard Center Draft Banquet GWTW $125.00 Lamps, lampshades, and chandeliers were very popular uses for slag glass. 6 Tips for Identifying Fenton Glass. This list is limited to only a few results.Many more items are available to our members through our American companies (Taylor, Northwood, Dugan, Akro Agate, Westmorland) began manufacturing this type of glass during the late 19th to early 20th century. Lot 167 : Roycroft/Dard Hunter Extremely Rare Table Lamp, Rago Arts and Auction Center , Lambertville, NJ Est: $40,000-$50,000 Stepped marble LAMPS.Two antique Czech glass fruit basket boudoir lamps., Cast spelter metal bases with figural handles, (one pair of handles as is). At first they painted glass blanks from other glass makers, but started making their own glass when they became unable to buy the materials they needed. The term slag glass is often used interchangeably with the terms flashed glass and stained glass. However, slag glass is a type of stained glass made from recycled materials. This roughness is caused by the recycled materials that make up slag glass, making it different from smooth stained or flashed glass. No other type of glassmakingincluding carnival, imperial, milk, depression, or uraniumhas this distinct creamy swirl effect. Identifying slag glass can be a bit tricky, as there are many different types and colors of slag glass. The key identifying feature of this type of glass is its similarities to the patterning found in natural marble. Since it is only partially mixed to create marbling, slag glass will have different tones of whiteness throughout the piece. Whats the difference between Slag Glass and Stained Glass? Identifying Slag Glass. $1,551 57% Off $3,600. Signed slag glass tends to be worth more than unmarked slag glass. In addition, slag glass panels were used in lamps, jewelry boxes, and other collectibles. FIGURAL SLAG GLASS LAMP. The wiring is not original to the lamp; originally it would have had cloth covered wire. The key identifying feature of this type of glass is its similarities to the patterning found in natural marble. . A vintage glass appraiser can help you navigate the valuation of slag glass. In the early 20thcentury, Thomas Dugan and Harry Northwood were the first to make imitation slag glass, called mosaic glass. In exceptional condition. On the other hand, slag glass can easily leave people confused. She has also managed an online antiques community. History. The SUCCESS burner was Pilabrasgo's "claim to . It has a unique, earthy appearance and can be found in a variety of colors. Many antique lamps of these periods were made with stained glass, rather than slag glass, and a careful review of the glass opacity and patterns is necessary to determine the difference. Look for age-related wear or markings on accompanying hardware, such as lamps or furniture. The marbling should be a creamy white color that is evenly mixed into the base color. ALL RIGHT RESERVED. Identifying Silhouette Slag Glass Lamp In Antique American Lighting, Antiques, Uncategorized on February 8, 2016 at 7:02 pm. Happy collecting! Eventually, it became known as slagware or slag glass. Glass Collectible Antique Lamps, Glass Tobacco Pipe, Coca-Cola Glasses; Additional site . SHADE A vintage figural spelter table lamp, the depiction of a young man holding a cluster of grapes. McCrory and Kresge also were major customers. ART DECO FIGURAL LAMP WITH ART GLASS SHADE: An oil burning lamp raised on a brass fluted. Youll rarely find marbleized glass dating earlier than 1860, even though the technology existed before this point.2. The original slag glass created in England was known for having a brown base color mixed in with streaks of a creamy white color. In this case, the slag used for marbling glass is produced when iron is heated during the production process. An antique piece from the UK would typically have one of these markings: While American vintages would bear the marks of: Be sure to check out this comprehensive guide on antique glass markingsto know what to notice when appraising an antique piece of glass. Atterbury & Company, Challinor Taylor & Company, and H. Northwood Glass Company are some well-known manufacturers from the United States. The key to determining if a piece of glass is "true" slag or just a handsome example of pressed glass is to look for glass that is obviously and richly marbled rather than simply colored or streaked. All rights reserved. 2. The lustrous glass often had threads of glass in contrasting colors pulled through the surface to form a feather shape. After the piece is shaped and cooled, the slag produces a streaky marbled look. Polly Pocket toys may be small in size, but they're big on value. Slag glass is pressed and untempered glassware, much like depression glass. The edges may be uneven or jagged, and the overall shape may be asymmetrical. Free shipping on many items . These lamps rarely sell for less than 100 dollars. Take a walk down the brick-lined memory lane with these vintage Lego sets. Prices go up significantly if a light is signed by a prominent manufacturer like Tiffany Studios or, to a lesser extent, Bradley & Hubbard. CO. SLAG GLASS LAMP Base marked M.L. Can you Tiffany Lamp Sells High Michaan's Auctions in California . Slag glass can be easily confused with other types of opaque glass, such as frosted or flashed glass. EMPIRE LAMP CO. SLAG GLASS LAMP bronze base marked 'Empire Lamp M.L. Always do your research and be cautious when purchasing or collecting slag glass. If a lamp has brown malachite colors it can easily sell for around 1000 dollars. It has distinctive a distinctive knob pattern and comes in a variety of colors. Sowerby also created several other color formulas including Giallo (yellow), Pomona (green), and Sorbini (blue). The slag floats to the top, cools, and is collected to mix and make slag glass. Brown with silky cream streaks was the first colorpalate of slag glass, and vintage pieces with this tint are some of the rarest and most valuable today. Slag glass is often cut and shaped by hand, leading to irregularities in shape. A piece of slag glass will be worth more if it is a rare color or a rare item. Slag glass is named after silicate slag, a colorful material that is a byproduct of molten steel. Chances are if the glass is colorful and has a rough texture, its slag glass. One clear indicator, though, of true slag glass is the richness of its tonal variations: real slag glass will not simply bear streaks of color but instead will offer more subtle variations in opacity and tone like one would expect from marble or alabaster. If you cant see any light passing through, the glass may be frosted or pressed glass instead of slag glass. To determine if an item is true slag glass or if its a combination of two molten glasses, consult a vintage glass appraiser. This type of glass was used to make all types of glassware, including panels for lamp shades. This type of art glass is highly sought after by collectors, so its definitely worth taking the time to learn how to identify it. There are several things to keep in mind when looking to identify whether something is slag glass or not. Very similar to the photo on page 182 of Paul Crist's book. In some of the most stunning lighting pieces, small pieces of the slag glass were laid out in a metal framework. 2)Inspect the color: Vintage slag glass can really only be found in brown, purple, green, and blue. Glass manufacturers were thought to have added slag from iron smelting to molten glass. Slag glass was also created by taking two colors of glass and combining them to create what was called "mosaic glass" in 1902 in Pennsylvania by glassmakers Thomas Dugan and Harry Northwood. Slag glass is created when steelmaking byproducts are melted down and formed into translucent blocks or shards. Its worth keeping an eye out for unique slag glass pieces in unexpected places! Use proper lighting to see the marbling and swirled patterns of slag glass. Verna Mae Wright died in 1990. According to the Glass Encyclopedia, Slag glass is made by mixing pulverized silicate slaginto glass-pressing. You'll find slag glass in blues, browns, and greens as well, though these colors are rarer than the brown/white/cream and purple formulations. Production of slag glass originated in late 19th century England. A few examples of modern glass manufacturers operating out of the US today are Boyd Glass, Mosser, and Summit. Most homes in the late 19th century and even some older homes today could be found using a slag glass lampshade as decor. This would still give the marble effect without the use of actual slag. This is the most obvious giveaway when trying to spot slag glass. It should not have white streaks mixed into the color, nor should it be one solid color. Pieces from well-known manufacturers or in rare colors may fetch a higher price. Ding dong! A glass decoration plant opened in early 1968. Vintage Swag Green Slag with Amber Glass Drop Light, Pendant Hanging Lamp . Because of its rustic look, slag glass is often used in stained glass windows, lamps, and other decorative items. In this guide, well cover everything you need to know about slag glassfrom its history to how its made, what its worth, and how to identify a vintage piece. Note the glass type 5. This slag is predominantly binary compoundsof elements such as silicon, sulphur, and aluminium reacting with the sides of foundry molds. George Davidson is believed to have made this brown buglein the late 19thcentury, one of the first pressed glass pieces known today. Save my name, email, and website in this browser for the next time I comment. Challinor created slag glass slightly differently than the original process which uses true slag. Color, age, and manufacturer are definitely important in determining the value of a vintage piece. Amber Caramel Slag Glass Hanging Swag Lamp Light Lighting Fixture 70's 1970's. $74.99. Look for labels indicating the glass is made from recycled materials, such as Cinderella or marble glass.. As long as you consider the key characteristics marbled pattern, rough texture, translucent quality you should be able to identify it accurately. These colors are created through different repurposing techniques. These patterns are created during the manufacturing process and give slag glass its unique appearance. The original factory was in an old glass factory in Martins Ferry, Ohio in 1905. It was my grandmothers and is over 60 years old. Dont confuse newer pieces with older, vintage ones. Jeannette Glassware, originally Jeannette Bottle Works, was founded in 1888. Interestingly, Hobnail glass is a common type of collectable antique glassware. How I can identify bent slag glass lamp issues Slag glass replacement panels are made to order.
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