ETYMOLOGY: From the greek word "kristallos" meaning ice and "Hard" in Slavic. Smoked by its brown color.

CRYSTAL SYSTEM: Trigonal.

PRINCIPLE OF FORMATION: Primary.

CLASS MINERAL: Oxides, quartz groups.

CHEMICAL FORMULA MINERAL ELEMENTS: SiO2 + (Al, Li, Na).

HARDNESS: 7 on the Mohs scale.

FIELDS: Brazil, USA. (Colorado), Swiss Alps.

MINEROLOGY: Smoky Quartz is a type of silicon or macrocrystalline quartz dioxide is formed in pegmatites or hydrothermally in drusen or cracks, this characteristic color occurs when rock crystal quartz is exposed to natural radiation from the elements ( aluminum and lithium) appearing in composition.

MYTHOLOGY: In the Alpine countries the smoky quartz is considered a protective stone against evil, why this mineral crosses were carved, the soldiers wore as a charm during the war. The smoky quartz can be artificially obtained by treating a radioactive rock crystal. The natural stones like this are very rare described such as sanidine (with light pink color) and axinite.

PROPERTIES: The smoky quartz helps to better cope with the pain and effort, relieves fear acts with a relaxing effect "anti stress Stone" brings emotional calmness, relieves nightmares, power positive thoughts, objectives and realistic, stimulates concentration fosters communication.

ZODIAC SIGN: Libra.

USES: Collection, meditation, decor, jewelry.