AVENTURINE GLASS Russian patent published in 1997 - IPC

FIELD: glass industry. SUBSTANCE: aventurine glass has the following components, wt. -%: $$$, 52.41-55.56; $$$, 3.99-6.21; $$$, 7.73-8.23; $$$, 0.47-0.53; CaO, 21.18-24.36; MgO, 0.01-0.02; $$$, 3.02-4.79; $$$, 1.68-1.98; $$$, 1.62-1.95; and $$$, 0.37-3.89. Aventurine glass has the following composition of parent components, wt.-%: plagiopegmatite, 50.0-56.90; carbonatite, 22.70-30.9; sphene concentrate, 8.70-15.9; potassium bichromate, 2.27-2.50; borax, 1.00-9.13. Glass making point is 1350-1380 C. Aventurine glass can be used for making the facing and artistic articles. EFFECT: enhanced quality of glass. 2 tbl