1 Removes water damage, stains, lime scale from any glass surface. 2  Our easiest to use kit is ideal solution for DIY repairs. 3  Designed to be used with electric drill (at recommended speed 1500 - 2000rpm)  Safe to use - Distortion Free, Comes with easy to follow step by step instruction.
The best obsidian is formed underground near a volcanic vent because those rocks will have limited impurities. Obsidian flows are so slow that often other obsidian flows will occur on top of each other causing a streaked appearance in the obsidian rock.he result is a rock that cooled so fast, crystals did not get a chance to form. Obsidian is a volcanic glass with a smooth and uniform structure. Interesting Obsidian Rock Facts: Different varieties of obsidian rock get their names from their appearance.
Obsidian, natural glass of volcanic origin that is formed by the rapid cooling of viscous lava. Obsidian is extremely rich in silica (about 65 to 80 percent), is low in water, and has a chemical composition similar to rhyolite. Obsidian has a glassy lustre and is slightly harder than window glass. Though obsidian is typically jet-black in colour, the presence of hematite (iron oxide) produces red and brown varieties, and the inclusion of tiny gas bubbles may create a golden sheen.