Onyx is a gemstone with alternating light and dark bands, which are colored in brown, red, black, white and grey.
It is a semiprecious
variety of the silica mineral agate with white and black,
brown or red alternating bands. Its properties are the same as those of
quartz.
It is the birthstone of Leo (Lion): July 23 - Aug 22 and is the anniversary gemstone for the 7th year of marriage. Black Onyx
is the anniversary gemstone for the 10th year of marriage.
The name onyx was used by the Romans for a variety of stones including alabaster,
chalcedony, and what is now known as onyx marble. Roman soldiers wore sardonyx talismans engraved with heroes such as Hercules or
Mars, god of war. They believed that the stone would make the wearer as brave and daring as the figures carved on it.
What is Onyx ?...
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