Onyx Semi Precious Stone
What is Onyx?
Onyx, the gem mineral, is translucent to
opaque, hexagonal with hardness 7, refractive index (1.54-1.55) and chemical
formula (silicate chalcedony (SiO2)). It exists in white, black, and mostly as
sardonyx (parallel red bands with white/yellow/orange).
How Onyx formed?
Onyx is made of bands of chalcedony in
alternating colors. The cryptocrystalline
consists of parallel bands of silica minerals quartz and moganite.
History behind Onyx
Sardonyx (red and white banded) has been described
in the Bible. Ancient Romans and Greeks used onyx. In 9-12AD, the Gemma
Augustea, the Roman cameo, (19x23 cm) piece framed in gold, shows translucent
carving of white figures against the black
onyx background.
The naturalist of
the 1st century, Pliny the Elder has
written about the use of onyx in “Naturalis
Historia.” Egyptians of 2nd dynasty made onyx bowls and potteries. Archaeological
findings at Knossos show the use of
sardonyx in Minoan Crete artwork.
Onyx is found in Argentina, Australia, Brazil,
Canada, China, Czech Republic, Germany, India, Indonesia, Latin America,
Madagascar, the UK, the US, Uruguay, and Yemen. Black onyx is artificially
treated.
Onyx Usage
In 1920-1930s, Brazilian used Green onyx as
a base for sculptures. Ferdinand Preiss,
the German sculptor, used the same for chryselephantine sculptures. Austrians made
Green onyx trays and pin dishes attached with bronze animals and figures.
We, Artefactindia with the intention of promoting
the dyeing marble inlay works manufactures the precious decorative inlay
products inlaid with precious and semi-precious gemstone. We do use this
historic Onyx decorative stone for manufacturing inlay decorative products.
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more about our products and to get clarified about its characteristic features
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to answer all the queries of customers. Dial +919557221114 or simply send an e-mail to support@artefactindia.com where one of our expertise people
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