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Biréfringence: -0
17mm Weight in grams: 7
Namely: Variety of spondumene
Couleur possible: Blanc et brunDensité: Entre 3 et 5Dureté: 7Système cristallin: TrigonalCassure: ConchoïdaleClivage: ParfaitPolariscope: Anisotrope (rétablit tous les 90°
VENDU Agate du Montana 2 chips Biréfringence: -0Montana agate cabochon. Color: Milky white tending towards gray with beige brown yellowish inclusions. Shape: Oval Size: 36. 88 x 29. 27mm Weight in grams: 11. 47g Carat weight: 57. 38 carat Country of origin: United States (Montana) Gemological information on Montana Agate: Note: The inclusions are manganese and iron oxides. Density: Between 2. 40 and 2. 91 Hardness: Between 6. 5 and 7 Crystal system: Trigonal microcrystalline Fracture:
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