GLASS Russian patent published in 1997 - IPC

FIELD: manufacture of decorative facing and jewelry products. SUBSTANCE: avanturine glass comprises (wt %): 51.25-57.34 silicon oxide; 6.14-7.67 aluminium oxide; 0.54-0.69 iron oxide; 1.58-2.00 chromium oxide; 0.10-0.1 titanium oxide; 16.88-29.50 calcium oxide; 1.34- 1.84 magnesium oxide; 0.35-0.54 iron oxide (FeO); 5.14- 12.26 sodium oxide; 0.61-1.28 phosphorus oxide; 0.44-0.91 fluorine; 0.48-0.90 sulfur oxide; glass brightness 6.37- 6.51 %; glass 108-119 %; liquidus temperature 1049-1113 C. EFFECT: improved properties. 2 tbl