This genuine piece of turquoise is from Cananea in Sonora, Mexico. It is an oblong piece in strong cyan blue with darker veining. It has been lightly tumbled to smooth out the sides.

4.5cm x 2.5cm x 1.5cm
20g

Turquoise is a microcrystalline phosphate mineral that has been used for jewelry and adornment since the fifth millennium BC. Its classic blue color comes primarily from copper, with the different shades resulting from the presence of other metals like iron or aluminum.