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Common opal is distinguished from noble opal by its construction
Color: Purple Shape: Drop Size: 23
flexible scales (micaceous)
Color: Pale pink Shape: Oval Size: 20
Possible color: Pink to red Density: Between 3
VENDU Ammonite noire 16 perle Common opal is distinguished fromAmmonite cabochon. Color: Black, White Shape: Oval Size: 51. 83 x 30. 29mm Weight in grams: 14. 28g Carat weight: 71. 41 carat Country of origin: India Gemological information about ammonite: Density: Between 2. 80 and 2. 95 Hardness: 4 Crystal system: Orthorhombic Cleavage: In many directions Polariscope: Anisotropic. Generally opaque, does not restore because unobservable. Spectrum: Indistinct
