Minerals are used for coloring carpets, combined with natural ones create various shades.
The most commonly used minerals for dyeing carpets are as follows:
OCRA: iron ore oxidized in soil. It is used for shades in yellow, brown and red.
MALACHITE: A mineral in deep green, it is actually copper carbonate mixed with copper hydroxide. Used for shades in green.
MANGANESE: metal element. Used for black shades.
VERMIGLION: a heavy red mineral with a metallic luster. It is composed of sulfide from mercury. Used for red shades.
AZZURRITE: a blue/dark mineral blue. It is crystallized and often found with a green malachite mineral. Both are produced by erosion and oxidation from the copper ore. Used for shades in blue.
ARAGONITE: a mineral usually colorless or white. Used for blank shades.
LAPISLAZZULI: blue stones. It consists of a mixture of azurite, calcite, paroxatins and other silicate minerals. Used for shades in blue.