There are 3 different colors to choose from darkest is identified as BLUE, medium Blue is ROYAL BLUE, lightest is TEAL BLUE. Glass Slumping Of Antique Lamps Or Slag Glass Or Lamp Repair. Not Specified. 1 Day Shipping. In the 1880's and 1890's a large amount of this kind of glass was made in the North East of England by all the major pressed glass manufacturers (Sowerby; Greeners; Davidson's). While slags are generally used to remove waste in metal smelting, they can also serve other ⦠2 Day Shipping. Used. see all. Only 1 available and it's in 3 people's carts. see all. Vintage Imperial Slag Glass Red Heart Dish, Vintage Red Slag Trinket Dish, Embossed Red Slag Glass Heart Dish, Imperial Hearts and Arrows VintagevaluablDesign. In the USA slag glass was made in the 19th century by Atterbury & ⦠see all. Some of the first iridized pieces made were Peacock, Sapphire and Nuruby. 5 out of 5 stars (918) $ 19.99. Please ⦠The name slag glass comes from the composition of the materials used to make the glass. This mark was used on open salts, glass shoes, and hats, candy containers, butter dishes, and other items generally made of slag glass, and sometimes with a carnival finish. These are absolutely stunning boulders and crystals of slag glass. Over $750.00. Under $350.00. Slag glass is opaque and decorative; the streaks of color are said to have once been the result of adding slag to molten glass, though this part of the description may be urban legend. Primary Material. Slag glass has been around since the late 1800s and became very popular in the early part of the 1900s, during the arts and ⦠The origins of slag glass as a decorative arts material are murky and speculative, but the end product is a beautiful and utilitarian image of nonfiction ⦠Glass Slumping Of Antique Lamps Or Slag Glass Or Lamp Repair $ 100+ / Ships in 8 weeks Customize this order (optional): ... Made in Chadds Ford, PA By Robert P. Horan, Art (0) All of our products are handmade by expert makers. 4 Day Shipping. Condition. Hazel Atlas Glass Co. Pamela Y. Wiggins This is the mark for Hazel Atlas Glass Co. Guaranteed Delivery. Slag glass is commonly found in purple, less common in blue and brown and green. 11 of 21. by Dr. Lori Verderame. No Preference. Antique Slag Glass Lamp Filter Applied. Original/Reproduction. Slag glass, also known as marble glass or malachite glass, is a type of opaque, streaked pressed glass.Production of slag glass originated in late-19th-century England, where glass manufacturers are thought to have added slag from iron-smelting works to molten glass to create a range of effectsâfrom tortoiseshell to ⦠Slag glass is usually the left over glass when a major glass operation such as window glass or bottle glass making is shut down to repair the melting tanks, etc., which is hammered to pieces just to get it out of the way. Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. Another company that came to be known for slag glass was Akro Agate, which made a name for itself in the early 20th century with its unique swirled marbles made by their patented process. Slag glass is the opaque pressed glass that has streaks of color within it. $350.00 to $750.00. This is Raw, but can be sealed upon request (as pictured in hand). The colors were produced by adding slag, an iron additive, to the glass during production. They introduced Carnival Glass five years later. 3 Day Shipping. Favorite Add to Black Iron/Slag wedigcrystals. see all. Appraisal: American Slag Glass Lamps, from Vintage Salt Lake City. Price. Imperial Glass Company originated in 1901 but it was not until 1904 that they actually started to make glass. It is sometimes confused with Anchor Hocking Glass Co., another â¦