Perles en calcite jaune entre 6 et 10mm Ovale pointu red-brown or purplish-red color is

red-brown or purplish-red color is caused by iron

38g Carat weight: 51

19mm Weight in grams: 10

67mm Weight in grams: 15

60 carat Country of origin: Congo Gemological information about malachite: Possible color: Light green to dark green with zoning Density: Between 3

Perles en calcite jaune entre 6 et 10mm Ovale pointu red-brown or purplish-red color isCalcite beads. Color: Yellow Sizes between 6 and 10mm Country of origin: India Gemological information on yellow calcite: Possible colors: Colorless, orange, white, blue, black, brown, magenta, yellow, Density: Between 2. 60 and 2. 80 Hardness: 3 Crystal system: Trigonal Fracture: Conchoidal Cleavage: Perfect Polariscope: Anisotropic, restores every 90 Refractive index: Ne: 1. 486 to 1. 550 No: 1. 650 to 1. 740 Birefringence: 0. 140 to 0. 190 Chelsea