What I do know however is the weight and colour. I have lots of other glass pieces too and glass crafting supplies - have a look.
eBay
48PCS Pottery Tools for Sculpting Carving Modeling Pottery Kiln Polymer Clay Tools for Trimming, Beginners, Adults, Art Supplies
Aliexpress UK
Microwave kiln glass kits is tool for making DIY glass jewelry. Fuse glass in your microwave - use a microwave oven with power of at least 1000 Watts for the best results.
eBay
11x24cm Sanrio Pom Pom Purin cartoon For Libbey 16oz Can Glass 3D Waterproof UV DTF Coffee Can Wrap Libbey Glass Wrap
Aliexpress UK
Glass kiln is a good tool for glass thermal processing. 1 Large microwave kiln. Microwave kiln outer size: 19.5 11cm (7.6 4.3 in); inner size: 13.5 4.5cm(5.3 1.8in). Fuse glass in your microwave. FOR ALL ORDERS.
eBay
Princess Cartoon 16oz UV DTF Cup Wrap Cartoon Libbey Glass Beer Can Tumbler Stickers Waterproof Adhesive
Aliexpress UK
Made with the unique technical, multi-faceted cutting, not easy to break or deform, bringing you a shiny and delicate effect. We'd like to settle any problem in a friendly manner. Material: Glass. It's just take you 1 minute.
eBay
Arrtx Acrylic Markers 48 Colors Brush Tip Acrylic Paint Pens for Rock Painting Glass Stone Wood Ceramic Fabric DIY Crafts
Aliexpress UK
Prevents glass from sticking to the base of the microwave kiln. For a perfectly smooth bottom on your glass, should be used with a piece of thinfire paper between the fibre paper and your glass. A ceramic fibre shelf paper that provides excellent separation between glass and kiln shelf.
eBay
Expansion coeffcient: COE90. When using black solid or pattern dichroic, place a piece of clear glass slightly larger than the base glass on top to protect the pattern/color. You will receive total 3 bags dichroic glass as blew pictures.Glass pendants made by dichroic glass in micrwave kiln.
eBay
Use of microwave kiln must be padded kiln paper, otherwise the glass will stick on the kiln tray. If the microwave kiln is wet, the kiln paper is black and yellow instead of white. Microwave Kiln for fused glass Arts crafts sewing DIY jewelry manual making for ceramic accessories tools supplies.
eBay
Prevents glass from sticking to the base of the microwave kiln. For a perfectly smooth bottom on your glass, should be used with a piece of thinfire paper between the fibre paper and your glass. A ceramic fibre shelf paper that provides excellent separation between glass and kiln shelf.
eBay