Tanzanite
Natural stone
A violet-blue zoisite from one place in Tanzania, nearly always heated for its colour. Fairly soft with a cleavage and sensitive to heat.
Hardness (Mohs): 6–7
Natural stone
A violet-blue zoisite from one place in Tanzania, nearly always heated for its colour. Fairly soft with a cleavage and sensitive to heat.
Hardness (Mohs): 6–7