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ONYX Chess Set

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Original price $120
Current price $100

Handmade and Handcrafted Luxurious Decorative Polished ONYX Chess Set (Brown & Cream) with custom packing.

 

Brown pieces are made of brown ONYX.

 

Cream pieces are made of cream ONYX.

 

 

ONYX:

Onyx primarily refers to the parallel banded variety of the silicate mineral chalcedony. Agate and onyx are both varieties of layered chalcedony that differ only in the form of the bands: agate has curved bands and onyx has parallel bands. The colors of its bands range from black to almost every color. Commonly, specimens of onyx contain bands of black and/or white. Onyx, as a descriptive term, has also been applied to parallel banded varieties of alabaster, marble, obsidian and opal, and misleadingly to materials with contorted banding, such as "Cave Onyx" and "Mexican Onyx".

It has a long history of use for hardstone carving and jewelry, where it is usually cut as a cabochon or into beads. It has also been used for intaglio and hardstone cameo engraved gems, where the bands make the image contrast with the ground. Some onyx is natural but much of the material in commerce is produced by the staining of agate.

                                

General

Category

Oxide mineral

Formula

Silica (silicon dioxide, SiO2)

Crystal system

Trigonal

Identification

Formula mass

60 g / mol

Color

Various

Cleavage

no cleavage

Fracture

Uneven, conchoidal

Mohs scale hardness

6.5–7

Luster

Vitreous, silky

Streak

White

Diaphaneity

Translucent

Specific gravity

2.55–2.70

Optical properties

Uniaxial/+

Refractive index

1.530 to 1.543