Obsidian is a glass-like mineral produced by volcanic flows. Many types of Obsidian are used as gemstones in jewelry, and some are quite rare and valuable.A fantastic variety of colors and patterns are...
Besednice Moldavite What is Moldavite? Moldavite is a green silica based tektite that formed during a meteorite impact approximately 15,000,000 years ago. The impact caused molten rock and...
Just reported from dealers at the 2007 Tokyo Mineral Show , certain Asian counterfeiters have taken molds from real moldavites and produced resin/glass copies. These are already showing up on eBay commanding...