タイトルまたは説明

Volcanic rock glass type, also known as volcanic glass obsidian, with *7% Si minral, offer black and brown colors, unlimited amount, Guatemala product family of white quartz, can be considered as an oxide of silicon. We offer this preducto in rocks from 2 inches to eight entire rocks. Also, in rocks up to 6 milimitros. In bulk or in bags of 1,**0 kgs. We export to anywhere in the world. We are direct producers.