ETYMOLOGY: It comes from the greek "onux" meaning nail.
CRYSTAL SYSTEM: Rhombic.
PRINCIPLE OF FORMATION: Secondary.
CLASS MINERAL: Carbonates
CHEMICAL FORMULA, MINERAL ELEMENTS: CaCO3.
HARDNESS:3.5 - 4 on the Mohs scale.
FIELDS: Italy, Mexico, Brazil, Russia, South Africa, Pakistan.
MINERALOGY: The commercially known materials such as onyx (Onyx) are scientifically alabaster (or calcareous alabaster) formed by deposition of calcium rich carbonate water bicarbonate, usually in cavities in the limestone massifs. The color of onyx is rarely uniform, so that the same site clear materials or even dark brown or white opaque (less appreciated variety) are alternated. Veins are very common or reddish brown spots, due to the presence of iron oxide.
MYTHOLOGY: It is a limestone composed of the mineral calcite and aragonite, not to be confused with chalcedony onyx. The name is derived from the Greek word meaning nail. The story is that one day Cupid cut the divine fingernails of Venus with an arrow while she slept, he left the clippings scattered on the sand, and fate turned into stone so that no part of the divine body ever died. and in the fifth millennium BC vases they were manufactured in Egypt with this stone. The age of the deposits of onyx usually recent (Pliocene and Quaternary), while the historical use is old.
PROPERTIES: It is said that onyx brown encourages self-realization, helps pursuing own goals, strengthen awareness and sense of responsibility, improve analytical thinking and logic, it gives us strength and perseverance. It helps to be in harmony with your surroundings.
ZODIAC SIGN: Capricorn.
USES: Meditation, collection, jewelery, ornamental stone table tops, elegant counters, various decorative elements, fireplaces, wall coverings and columns backlit are some other applications besides their use in sculptures.