Obsidian Obsidian is volcanic glass. Oligoclase Oligoclase has the formulae (Na,Ca)AlSi3O8 and a relative hardness of 7. It is a plagioclase interest to petrologists and collectors.

Raghav Steels Bulk supplier of premixed ramming mass, packed ramming mass, acidic premixed ramming mass, acidic packed ramming mass, ramming mass, grades of ramming mass, silica ramming mixes, premixed ramming mass, packed ramming mass, ramming mass granules, india.