This is a beautiful Moldavite Piece from Chlum nad Malší, South Bohemian Region, Czech Republic
Dimension: 5cm (1.9”) x 1.5cm (0.5”)
Weight: 7.1 grams
Moldavite (also called Bouteille Stone or vltavin) is a natural glass that is thought to have formed in the heat of an asteroid impact. This event occurred about 15 million years ago, and a splatter of hot glass formed a strewn field across central Europe.
Chemical Formula: SiO2(+Al2O3)