VENDU Piétersite 6 Perte de poids Black obsidian can be confused

Black obsidian can be confused with:

Informations gemmologiques sur l'opale commune rose:

Cassure: Irrégulière Clivage: Aucun

553 Birefringence: 0

Polariscope: Anisotropic

VENDU Piétersite 6 Perte de poids Black obsidian can be confusedPietersite cabochon. Color: Blue Shape: Drop Size: 33. 90 x 16. 04mm Weight in grams: 4. 86g Carat weight: 24. 32 carat Country of origin: Namibia Gemological information about pietersite: Note: Pietersite is a variety of chalcedony. Possible colors: Blue, gray, yellow and brown Density: Between 2. 50 and 2. 75 Hardness: Between 6. 5 and 7 Crystal system: Trigonal Different countries where pietersite may be mined: Namibia and China