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- Lapis-lazuli synthétique
Gemological information about pietersite:
biotite (black dots)
Line in the Red at around 688 nm and Weak and broad band centered at around 650 nm
rétablit tous les 90°
VENDU Fluorite brut 6 cristal de roche - Lapis-lazuli synthétiqueRaw fluorite. Colors: Green Approximate dimensions: Length: 7. 2cm Width: 4. 5cm Thickness: 3. 2cm Weight: Approx 78g Country of origin: Madagascar Gemological information about fluorite: Possible color: Blue, brown, orange, pink, green Density: Between 3. 18 and 3. 25 Hardness: 4 Crystal system: Cubic Fracture: Conchoidal, irregular, brittle Cleavage: Along the faces of the octahedron Polariscope: Isotropic, does not restore or polarization anomalies
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