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Onyx: Black
Magic

In jewelry design as in fashion, colors look crisper against a
background of black and black and white always looks right. In fine
jewelry, the black backdrop is often supplied by onyx, a chalcedony
quartz with a fine texture and black color. Some onyx also displays
white bands or ribbons against a black background. If the layers are
even, this type of onyx can be carved into cameos.
Onyx was very popular with the ancient Greeks and Romans. The name
comes from the Greek word onux , which means fingernail. The story
is that one day frisky Cupid cut the divine fingernails of Venus
with an arrowhead while she was sleeping. He left the clippings
scattered on the sand and the fates turned them into stone so that
no part of the heavenly body would ever perish. True, black isn't
normally the color one associates with fingernails. (Did Venus wear
Vamp?) But in Greek times, almost all colors of chalcedony from
fingernail white to dark brown and black were called onyx. Later,
the Romans narrowed the term to refer to black and dark brown colors
only.
Onyx which is reddish brown and white is known as sardonyx. Sardonyx
was highly valued in Rome, especially for seals, because it was said
to never stick to the wax. Roman General Publius Cornelius Scipio
was known for wearing lots of sardonyx.
Black onyx especially shines when used a backdrop for color play.
Its fine texture also makes it ideal for carving, making it a
favored material for today's lapidary artists. In the pin by
designer Susan Helmich above, a carved piece of onyx with threads of
white provides a stunning backdrop for a flash of color. Onyx was
often used as the perfect foil for carved rock crystal or the drop
dead red of rubies in Art deco designs. It is also popular in
marcasite jewelry. So if you would like to add a little black magic
to your jewelry design, consider onyx.
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