With the first versions of slag glass being an opaque brown with cream to caramel-colored streaks, slag glass is also known by the names of brown malachite or brown marble vitro porcelain (brown marble). Performance & security by Cloudflare. 1230C - 10 1/4 Ceramic Green Tone Vase Lamp. Dr. Anthony J. Cavo is an honors graduate of the Asheford Institute of Antiques and a graduate of Reisch College of Auctioneering. These colors are created through different repurposing techniques. Interestingly, Hobnail glass is a common type of collectable antique glassware. Telling slag glass apart from other styles is actually quite simple. A similar look was created around the same time by U.S. manufacturers Northwood and Dugan. Prof. Busch working group is focused on solid metallic glass and biomaterials. All slag glass will be a marbled mix of some opaque color with opaque white. . Copper tone spelter. Sowerby was a popular producer of this blackberries and cream slag look. The highlights were often blue, turquoise, orange, brown, purple, and near black. This does use the broader definition of slag glass that includes white marbling produced through any method. 17 1/2" diameter 24" high. EMPIRE LAMP CO. SLAG GLASS LAMP bronze base marked 'Empire Lamp M.L. According to the Glass Encyclopedia, Slag glass is made by mixing pulverized silicate slaginto glass-pressing. "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. Slag glass, also known as marble glass or Cinderella glass, is an opaque, swirl-patterned glass. 210.180.118.189 A reader sent me the above photograph with a request that I identify the above lamp. $40.00 shipping. How to tell if stained glass is real? (Quick Tests!) - Crafting Pal The key identifying feature of this type of glass is its similarities to the patterning found in natural marble. An avid antiques collector herself, Kate has written about antiques for many years. What is Slag Glass? Price Guide and History - Invaluable The unique coloring and pattern make it perfect for statement decorations. In addition, slag glass panels were used in lamps, jewelry boxes, and other collectibles. Tiffany lamps are famous for the vibrant colors and varied textures used in the glass design. The three lights retains their 1930s; verdigris patinated spelter female nude dancer, on new Donegan cast iron step base, one arm supports, light with frosted glass globe, 22 in. Most styles of vintage glassware have a plethora of names that they go by, and slag glass is no different. Slag glass gets its name from slag. Slag Glass Identification. Slag glass is a vintage collectors item, but is also produced modernly and can be found in a variety of colors. This is the most obvious giveaway when trying to spot slag glass. Exceptional lamp. Most slag glass replacement panels are completed the same week. Identifying the Base. If you're examining a glass kerosene lamp, look for a brass collar. 9. Designers would create intricate stained glass style patterns and scenes within lampshades. Two of these patents, numbers 656891 and 774602, clearly depict the SUCCESS burner in their accompanying patent drawing. The mosaic glass created in Pittsburgh was a mixture of purple and either white or an opal shade. Figural lamp of a maiden standing on rockery with flowing gown and floral belt standing amongst foliage. When identifying slag glass, look for a marbling effect. Ruby Red LLC is compensated for referring traffic and business to these companies. The edges may be uneven or jagged, and the overall shape may be asymmetrical. All rights reserved. True slag glass was originally produced in England during the last quarter of the 19th century when, simply put, it is believed slag from iron-smelting was added to molten glass to achieve a marbling effect in a variety of colors. While Handel first produced mosaic glass shades for its lamps, they soon branched into other design areas. Identifying slag glass can be a bit tricky, as there are many different types and colors of slag glass. Take a walk down the brick-lined memory lane with these vintage Lego sets. $1,200 Sale Price 14% Off . Prices go up significantly if a light is signed by a prominent manufacturer like Tiffany Studios or, to a lesser extent, Bradley & Hubbard. But what makes a slag glass lamp collectible, and how can you tell if you have a genuine antique? H. Scantily clad figure stretching to support the shade. 5.Your shipping address for return shipping quote. This type of art glass is highly sought after by collectors, so its definitely worth taking the time to learn how to identify it. Find Fenton markings 3. Vintage Slag Glass Lamp Antique Boudoir Lamp Slag Glass Lamp Arts & Crafts Lamp Art Nouveau Vintage Lamp Ornate Lamp 5 out of 5 stars (115) $ 375.00. Slag Glass Table Lamps - 29 For Sale at 1stDibs If the glass is opalescent (has more than one color), it is probably made after 1880. Delivery from Downers Grove, IL 7-14 days Edit my Location. Click to reveal Outstanding glass and color. 30 slag glass lamps for sale; 401-314-6005 (12-6 ESTime) non text# Email pictures to: Len.Daley@yahoo.com. Included one glass screen with crack with figures of 2 seated nude maidens either side of center lamp with multi-color glass globe shade, no visible markings. If the metal is shiny, the glass is pristine, and the lamp generally looks newer overall, it might be a reproduction. 1231C - 10 1/4 Ceramic Amber Tone Vase Lamp. It is the skill with which original copper foil shades were assembled that largely separates vintage shades from modern reproductions and most fakes. 2022 HEIRLOOMS AT HOME & AGELESS HEIRLOOMS. As molten iron cools, a silicate slag forms on top of it. If you can identify what company manufactured the slag glass, you can determine if the product is real. When identifying authentic slag glass, pay close attention to the marbling. This common characteristic of slag glass can add to its unique appearance. The older it is, the higher in cost. Est. Atterbury & Company, Challinor Taylor & Company, and H. Northwood Glass Company are some well-known manufacturers from the United States. So keep your eye out for glass made by these companies from the 19th century. McCrory and Kresge also were major customers. This is listed on the bottom of most slag glass items, especially lamps. In addition to some examples shown below on this page, you can also search our price guide for your own treasures. Another common use for slag glass was for various lighting pieces. It has distinctive a distinctive knob pattern and comes in a variety of colors. Typically vintage pieces will be worth the most, but some collectors may still value the piece. If it feels bumpy or uneven, its likely slag glass. I grew up going to antique stores and markets with my mom and grandmother. This website uses cookies to improve your experience. White melts into a pale lavender when it intersects with the opaque purple. 1551 Extended Return Eligible. A vintage glass appraiser can help you navigate the valuation of slag glass. Bradley And Hubbard Lamp - 31 For Sale on 1stDibs Hopefully, these tips will help make your search for slag glass a successful and enjoyable experience. Marble design mushroom shade has a 7 1/2'' dia. This is a big part of why slag glass is so valued today. If you're a collector of antique lighting, you've likely come across slag glass lamps. A more specific title for this type of glass would be mosaic glass.