Colombianite: also known as lightening stone & Piedra Rayo Stone, often mis-sold as a Tekite with a very similar appearance to Moldavite and is known as a Pseudo-Tekite. It is actually an ancient and rare Obsidian/ Volcanic Glass and an estimated 30 million years old and a prized sacred stone of the Muisca tribe. These are of particularly high grade, with very little imperfections if any. Size: 2.5cm average Price is per piece and supplied in a display case. Larger Pieces available on request.