Smithsonite

Description

Zinc Carbonate which crystallizes in the trigonal system
General Physical properties: hardness 5 - density from 4.1 to 4.5 - refractive indexes 1.621 and 1.849
Due to the low hardness, it is cut as gem only for collecting purposes

- Weight: 2.04 Kt

- Size 9.25 x 5.50 x 3 mm

- Cut: table and steps with elongated octagonal shape

- Color: semi-transparent, very light blue-green with vitreous lustre

- Purity: pure

- Treatments: none

- Origin: Mexico