When iron-ore is smelting during steel production, the remaining residue is a glass-like, glossy material. The number of broken pieces. 1230C - 10 1/4 Ceramic Green Tone Vase Lamp. Look for age-related wear or markings on accompanying hardware, such as lamps or furniture. Over time, other companies like Imperial Glass, Akro Agate, and Westmoreland began producing and selling their own versions of slag glass. Sowerby, a popular pressed glass manufacturer in the UK during this time frame, was the first manufacturer to start producing slag glass. Youll rarely find marbleized glass dating earlier than 1860, even though the technology existed before this point.2. Ruby Red LLC is compensated for referring traffic and business to these companies. Fenton Rose Pastel Hobnail 4 1/2-inch Vase. However, its important to note that some sellers may falsely advertise a piece as slag glass, so do your research before making a purchase. Slag glass also has a rough texture compared to other glass types. George Davidson is believed to have made this brown buglein the late 19thcentury, one of the first pressed glass pieces known today. Antique Slag Glass Lamp, 8 panel umbrella. They may have additional insight or knowledge on identifying slag glass. 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. It is the skill with which original copper foil shades were assembled that largely separates vintage shades from modern reproductions and most fakes. Some later manufacturers include Boyd, Imperial, and Westmoreland. Some of the other names for slag glass come from its historical beginnings. Avoid using any harsh chemicals or abrasive scrubbing tools, as these can damage the glass. Shade measures 7 1/4" x 16 1/2". Remember, the most common way to make slag glass was by skimming silicate material from the top of molten iron. I grew up going to antique stores and markets with my mom and grandmother. 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. Verna Mae Wright died in 1990. Other manufacturers quickly caught on and the style rose in popularity soon following its creation. 1230A - 10 1/4 Alpha Art Glass Green Vase Lamp. Serious antique glass collectors will be familiar with "slag glass" which became popular in the late 1800s and is still made today. This mark is usually made at the bottom of the lamp. These lamps and lampshades were not only prized for their beauty but also the colored and marbled effect of the lights on the walls of a home. Original Tiffany Lamps employed this metallic finish on the resin base. If they look and feel smooth and consistent, it was likely machine painted. Vintage lamps will show typical signs of aging, such as patina on the metal . Always remember to inspect glassware in a room with good lighting. This common characteristic of slag glass can add to its unique appearance. Kitschy Avon Collectibles With Nostalgic Appeal. Happy collecting! You can tell the age/authenticity of stained glass by looking at the glass that's used. A large part of the 2,700 m exhibition area is located under Schlossplatz. Popular slag glass lampshades shapes included mushroom, dome and flower petals. In addition to some examples shown below on this page, you can also search our price guide for your own treasures. However, towards the edge of the streak, the slag may instead be a lighter and creamier version of whatever the base color was since they were more mixed together. To test the texture, run your fingers over the surface of the glass. Real slag will always have a creamy marble effect. This guide will explain how slag glass was made, when it was popular, and what its worth. Shop at WAYFAIR Finally, a Bradley & Hubbard slag glass lamp sold for $584, typical for that style and age of light. There are three ways to differentiate vintage slag or mosaic glass from modern iterations: 1)Examine the marbling pattern: While both new and older pieces will have a marble look, its certainly not enough to spot an antique. Your IP address cannot be used to identify you. French Art Nouveau "La Serenade" Figural w/ Slag Glass Shade . Antique Purple and White Slag Glass Cake Stand, Antique EF Industries Green Slag Glass Table Lamp. Have you ever wondered what someone meant by slag glass? Outstanding glass and color. Examine the lamp base and verify that it has a real bronze finish. The value of slag glass is determined by the rarity of the item and the color. 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. Brown malachite slag glass pieces are the rarest and most coveted colors of slag glass. These three manufacturers are very well known in the United Kingdom. 2. Search Alerts. Sowerby was a popular producer of this blackberries and cream slag look. A reader sent me the above photograph with a request that I identify the above lamp. Marble design mushroom shade has a 7 1/2'' dia. If you cant see any light passing through, the glass may be frosted or pressed glass instead of slag glass. Lot 167 : Roycroft/Dard Hunter Extremely Rare Table Lamp, Rago Arts and Auction Center , Lambertville, NJ Est: $40,000-$50,000 If you suspect that the piece may be vintage, check for age-related wear or markings on the glass itself or any accompanying hardware, such as lamps or furniture. Happy cleaning! The first test in evaluating shades is to closely inspect the quality of the leading, the soldered seams holding the pieces of glass together. The term mosaic glass is much more inclusive and includes these pieces that look like slag glass but dont actually contain any slag. Electrified with hanging chain, Arts and Crafts style hammered brass andArts and Crafts style hammered brass and slag glass lamp unmarked early 20th century; with green slag glass panels and reticulated shade square base 26 Because of this, there is always a distinctive bump, indentation or spot where the glass was cut from the stem after it was shaped for the lamp. White melts into a pale lavender when it intersects with the opaque purple. If the base color is brown, purple, blue, or green theres a decent chance that it is a vintage make. Examine the area under the burner, and look for a collar. Slag glass, also known as marble glass or Cinderella glass, is an opaque, swirl-patterned glass. Amber Caramel Slag Glass Hanging Swag Lamp Light Lighting Fixture 70's 1970's. $74.99. 1235 - 8 1/2 Florentine White Moonstone Vase Lamp. Despite its rarity, you can still find slag glass items in modern homes. This leads to marbling in the colors of the glass. The ecology website also notes that slag glass can be incorporated into landscaping designs or used as decorative stones in gardens and ponds. Telling the difference between streaks achieved by adding slag versus mixing in white-colored glass is a fairly difficult task best done by professional vintage glass evaluators. In exceptional condition. 4,089. 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. The molten glass is placed into forms and then pressed to get the right shape and emboss the surface with a pattern. Slag glass pieces can sometimes be found at flea markets, antique stores, and online marketplaces. Hanging Slag Glass Lamp, ca. If the glass is opalescent (has more than one color), it is probably made after 1880. [more like this] FIGURAL SLAG GLASS TABLE LAMP: Patinated spelter figure of a standing woman on art nouveau style base, double socket fixture, no visible makers mark, 23 3/4'' h. x 7 1/2''. Happy hunting! Brush strokes, however, are an indication that the lamp was hand-painted. Manufacturers usually make slag glass by mixing this silicate slag with clear glass. This color pattern led to the "brown malachite" and "brown marble" names. There is another theory that slagware, and some other glass decorated with multi-colored enamels, were made up from odds-and-ends of glass left over at the end of the day, Webber reiterates.3, The most common base colors include white, cream, primrose, and blue. Very similar to the photo on page 182 of Paul Crist's book. Theres a fairly large price range for slag glass, with intricate vintage lampshades fetching the highest price. Slag Glass Panel Lamp By the Empire Lamp Company with Two Color Shade. Tiffany . Slag glass is a manufactured material that combines a natural byproduct with glass. Glassmakers have achieved a similar-looking marbled effect to slag by simply mixing two different colors of glass together. Antique slag items are usually brown, blue, green or purple. If the piece is pink, orange, or red it is not vintage. Slag glass is not completely opaque like frosted glass. Take extra care to avoid leaving any streaks or marks on the surface of the slag glass. There are many high quality reproductions on the market . As with any glass type, or art in general, different circumstances and people have adopted different names for slag glass. These beautiful pieces of functional art were popular in the late 19th and early 20th centuries, and today they remain highly sought after by collectors. (History, Series & Value). 2)Inspect the color: Vintage slag glass can really only be found in brown, purple, green, and blue. One of the most common alternate names for slag glass is marble glass, for obvious reasons. Depending on the rarity of the item, slag glass is worth anywhere from $50 to $1500. M.L. France, Late 19th Century. They are a great way to add color to any room. Slag is a somewhat unusual word, and unless you really know your glassware, the term Slag Glass probably wont ring a sort of bell at first. $1,551 57% Off $3,600. Discerning Victorian consumers resisted purchasing marbleized glass in some cases and preferred more decorative elements in crystal. 1236 - 8 1/2 Florentine Green Moonstone Vase Lamp. Be sure to leave us a comment. This created the marbled effect and bright variations in color that make slag glass so unique. Figural lamp of a maiden standing on rockery with flowing gown and floral belt standing amongst foliage. Hanging Slag Glass Lamp, ca. The company, based in Jeannette, Pennsylvania, rebranded in 1898 and took on the name Jeannette Glassware. Two vintage brown Sowerby figurines can sell for two completely different processes depending on how the marbling came out. 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. Its worth keeping an eye out for unique slag glass pieces in unexpected places! There are several things to keep in mind when looking to identify whether something is slag glass or not. The older piece, the greater value it has. Sotheby's, New York, NY (December 2017) Estimate: $300,000 - $500,000. There continues to be a vibrant market for antiques of all varieties due to their breathtaking beauty and exquisite designs. It wasnt longer before Davidson, Sowerby and other glass makers began experimenting with different colors, combining streaks of creamy opal with purple, yellow, blue, and green. This material takes on different colors depending on the minerals and elements that are present in the iron. Fenton, Mosser, Boyd Glass, and Summit are some of the common, modern, U.S. manufacturers of slag glass. Made of curved slag glass panels set into a metal frame, that from the photograph appears to be brass, this is a very nice example of . Without the need for the residue product of iron ore, the manufacture of mosaic glass exploded in Europe and the US and its popularity has not waned since. You may find one for as cheap as $230, but very rare pieces will definitely attract collectors and drive up prices into the thousands. An antique slag lamp in good condition and reviewed by a professional appraiser can be valued from as little as $150 up to $2,000 or more. Slag glass is no longer produced as it once was. 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. 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. Manufacturers experimented with different methods to achieve this malachite-like look. Of course, no discussion of antique lamps is complete without the Tiffany Pond Lily Lamp, circa 1903, which sold at auction in 2018 for a record-breaking$3.37 million. The chart below highlights some recently sold slag glass items. Prof. Busch working group is focused on solid metallic glass and biomaterials. Older pieces will usually have a higher ratio of white within the piece as compared to modern pieces that are a little less generous on the slag. In this case slag, a by-product from iron smelting, is mixed into the molten glass before pressing. New York Art Deco Nude Dancer Spelter. This is listed on the bottom of most slag glass items, especially lamps. 1231A - 10 1/4 Alpha Art Glass Amber Vase Lamp. Jeannette Glassware, originally Jeannette Bottle Works, was founded in 1888. Pictures of both the inside and outside of the lamp. 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 . 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. Some stained glass pieces may appear very similar to all of the small pieces in beautiful patterns. Rubber and vinyl coated wires were not used until the post-World War II era. Look for a Fenton tag (used before 1970), look for the Fenton mark ("Fenton" in an oval), look for "F" in an oval, indicating another company's mold was used (1983+). On the other hand, slag glass can easily leave people confused. Slag glass antique lamps sell Between $200 and $2,000, and most of the value is in the light itself. Your lamp appears to have six panels and looks to be in very good condition. The smaller boudoir lamps can be 7 or 10 inches. 2. SHADE A vintage figural spelter table lamp, the depiction of a young man holding a cluster of grapes. Whats the difference between Slag Glass and Stained Glass? Unique antique lamps, especially those made during the Victorian era, had glass that was hand blown. This does use the broader definition of slag glass that includes white marbling produced through any method. Recent Activity. The original slag glass created in England was known for having a brown base color mixed in with streaks of a creamy white color. These patterns are created during the manufacturing process and give slag glass its unique appearance. Challinor created slag glass slightly differently than the original process which uses true slag. Look out for its bases and edges 4. If youre still unsure if a piece is slag glass, consult with a professional or experienced collector for their opinion. Overview. Spelter Newel Post Lamp w/ Czech Glass, FRENCH ART DECO SPELTER FIGURAL LAMP, Circa. All rights reserved. Leave it in the comments below! On the other hand, Tiffany Studios decorative items sold for several thousand dollars. 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 often cut and shaped by hand, leading to irregularities in shape and uneven edges. $24,900.00. I would say the lamp is from the 30's or 40's. glass glasses lamps marks plates. Set of four antique embossed brass hanging lamp socket covers, 3 3/4" in diameter overall. These colors are created through different repurposing techniques. Another early slag glass was the purple malachite glass by Sowerby, which was sold in the United States under the name "blackberries and cream." Slag glass was first created in England in the 1880s as an opaque brown with white streaks from iron slag. One of the easiest ways to identify slag glass is by its marbled or swirled pattern. Most companies have halted the production of slag glass items altogether. rim, lamp is 20'' long x 11'' long. column support set beneath an opaque glass fount with painted silhouette bird and foliate detail and with a spherical etched glass shade and clear glass chimney together with search our price guide for your own treasures. This wouldnt be considered slag glass in the strict traditional definition, but many collectors will still use the term to refer to any marbled, opaque, pressed glass pieces. eBay (258) Magazine. It was my grandmothers and is over 60 years old. Related Posts: Plated Amberina - Rare, Colorful Art Glass Plated amberina glass, with color that graduates from amber to; Glass Paperweights You cannot fix a cracked snow dome paperweight. The principal feature of slag class is that its made from a residue by-product of iron smelting. Ruby Red LLC is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. The history of slag glass goes back to the late 1890s in Gateshead in the northeast of England. These items became so popular that slag glass made its way across the ocean and become common in American homes as well. If the glassware is marked by the manufacturer, you can use that to reverse search information about your piece. 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. 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. Vintage Lamps and Lighting. Traditional slag glass gets its creamy colored streaks from something called slag. Two of these patents, numbers 656891 and 774602, clearly depict the SUCCESS burner in their accompanying patent drawing. When identifying slag glass, look for a marbling effect. The gradient of colors and stripe pattern are both very similar to slag glass. This slag is predominantly binary compoundsof elements such as silicon, sulphur, and aluminium reacting with the sides of foundry molds. Prices go up significantly if a light is signed by a prominent manufacturer like Tiffany Studios or, to a lesser extent, Bradley & Hubbard. Its important to note that the coloration of slag glass can also vary depending on the lighting, adding to its distinct charm. 30 slag glass lamps for sale; 401-314-6005 (12-6 ESTime) non text# Email pictures to: Len.Daley@yahoo.com. List of Vintage Lamp Manufacturers Advertisement About Paul Phipps These beautiful old light fixtures can also be incredibly valuable, so knowing how to spot a, Collector Marbles: A Basic Guide to Types and Values. A more specific title for this type of glass would be mosaic glass. Designers would create intricate stained glass style patterns and scenes within lampshades. You may also wish to polish the piece with a small amount of mineral oil for added shine and protection. The marbling should be a creamy white color that is evenly mixed into the base color. Lamp measures 5 1/2'' h. x 11'' x 5'', globe measures spelter figure of a standing woman on art nouveau style base, double socket fixture, no visible makers mark, 23 3/4'' h. x 7 1/2''. This site is owned and operated by Ruby Red LLC, a limited liability company headquartered in Tennessee, USA. Arts and Crafts Limbert Style Slag Glass Lamp Don't miss out on this valuable resource - visit our research tools today! Explore other items from ourAntiques & Collectibles Price Guide. Sowerby also created several other color formulas including Giallo (yellow), Pomona (green), and Sorbini (blue).

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