CRYSTALS of MADAGASCAR

The company ZO.A.RA offers also the varieties of quartz like: Amethyst, dark and light smoky quartz, Amethyst, fluorite, pink quartz, blue quartz, quartz girasol (Milky), red, yellow and green hematoid, quartz crystal and inclusion.

Physical property:
Very hard (7 on the Mohs scale), the α quartz crystallized below 573 ° C and quartz β between 573 ° C and 870 ° C at atmospheric pressure at the sea.

Chemical Properties:

Quartz is a mineral species of silicates group, subgroup tectosilicates, composed of silicon dioxide of the formula SiO2 (silica), with trace amounts of various elements such as Al, Li, B, Fe, Mg, Ca, Ti , Rb, Na, OH.