mica block V2 , Ruby clear hard of unform colour fairlyfree from all vegetable and mineral stains cracks buckles and other similar defects and foreign inclusion except for few tiny air inclusion in not more than one fourth of the usable area crystallographic discolouration peremimore...
Mica blocks mica block v1, ruby clear hard of uniform colour , flat , free from all stains and foreign incllusions , waves cracke , buckles and other similar , defects crystallographic discolouration is permitted to a limited extent. mica blocks are available in various types rubmore...