Minerals identify

Know how to recognize them

Turquoise

Phosphate mineral

Turquoise is an opaque, blue-to-green mineral that is a hydrated and aluminium Al. It is rare and valuable in finer grades and has been prized as a gemstone and ornamental stone for thousands of years owing to its unique hue. Like most other opaque gems, turquoise has been devalued by the introduction onto the market of treatments, imitations and synthetics.

The gemstone has been known by many names. Pliny the Elder referred to the mineral as callais (from Ancient Greek κάλαϊς) and the Aztecs The word turquoise dates to the 17th century and is derived from the French turquois meaning "Turkish" because the mineral was first brought to Europe through Turkey from mines in the historical Khorasan (Persia

Identification

Mohs scale ( mineral hardness )

5

The streak

White

Density ( specific gravity )

1.61
1.615
1.65

Luster ( interacts light )

Vitreous
Waxy

Crystal ( diaphaneity )

Triclinic