Perles en calcédoine entre 6 et 10mm Sizes:10mm Weight in grams: 30

Weight in grams: 30

Perles en jaspe porcelaine

Amethyst can be confused with:

Refractive index: Hard to read

Biréfringence: Difficile à lire

Perles en calcédoine entre 6 et 10mm Sizes:10mm Weight in grams: 30Chalcedony beads. Color: Green and brown Sizes between 6 and 10mm Country of origin: Brazil Gemological information about chalcedony: Possible color: Red, orange, blue, green, white, gray, pink, brown Density: Between 2. 68 and 2. 90 Hardness: Between 6 and 7 Crystal system: Trigonal Microcrystalline Fracture: Conchoidal, irregular Cleavage: None Polariscope: Anisotropic, constantly restoring Refractive index: Difficult to read around 1. 53 to 1. 54