Strand of turquoise with matrix a RondelleØ 7 mm

The Turquoise It belongs to the mineral class of phosphates and its color goes from the blue sky to green and typically with "Cerosa" shine.

Often, associated with turquoise, there is the so-called matrix composed of iron and rock rock hydroxides, brown or black; When this matrix presents itself in the form of a network of finely distributed fine veins that "Spider Web" (spider web) is called turquoise.