Onyx or onyx (from the Greek onyx, nail) also known as marble onyx or calcareous onyx, is a group IV mineral (oxides), according to the Strunz classification, considered a semi-precious stone. It is composed of silica (silicon oxide, SiO2).
Measurements: 9.5cm high.
Onyx or onyx (from the Greek onyx, nail) also known as marble onyx or calcareous onyx, is a group IV mineral (oxides), according to the Strunz classification, considered a semi-precious stone. It is composed of silica (silicon oxide, SiO2).
Measurements: 9.5cm high.
It has a volcanic origin, caused by the accumulation of volcanic gases. It is mainly used in jewelry and decorative items, due to the attractiveness of its greenish tones, and the quality of its polishing.
In Argentina this stone is found in the town of La Toma, province of San Luis, and its surroundings. There it is argued that its quarries are the only ones on the planet; and they are, but only green onyx. The world's largest producer of onyx is Pakistan.
In Mexico, the largest area of America is in the Laguna (state of Durango).
Please sign in first.
Sign in
Please sign in first.
Sign in
English
Español
Português PT
Français
Deutsch
Italiano