Moldavite

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Moldavite is formed from melted rock resulting from a meteorite strike. The surface of these small specimens can be rippled (roiled), wavy, pitted and generally not smooth. Not usually seen in jewelry, but its popularity is on the rise.
Moldavite from Besednice, Bohemia
Gemological information for Moldavite
Color The color of moldavite varies from green to brownish green to black
Crystal Structure Amorphous
Refractive Index 1.48 - 1.50
Durability Moderately good
Hardness 5.5
Similar stones Glass
Treatments None
Country of origin Found in many locations, the location is usually part of the name i.e. Georgiaite, Australite
Ultrasonic cleaning Probably safe
Steam cleaning Not safe
Warm soapy water Probably safe
Chemical attack Reacts to hydrofluoric acid
Light sensitivity None
Heat sensitivity Rapid temperature changes can cause breakage
Lang Antiques
Lang Antiques