Dravite 2.71 ct.

 Dravite

is a complex Sodium Magnesium Iron Boro-Aluminium Silicate with formulna NaMg3(Al,Fe)6Si6O18(BO3)3(OH)4 and hardness of 7-7.5.

It belong to the tourmaline group, while the two other species Schorl is iron rich, and Elbaite ,lithium rich ,with many colors.

Is not very appealing and not so common; the colors are brown in all tones.

From Brazil.

Size:8.4x8.4x4.8 mm.

Weight: 2.71 ct.

CODE#4592