Botswana Agate 16mm A Grade Coin Cabochon Mandrel and is a result of

and is a result of trace amounts of copper or chromium

All species of garnets possess similar physical properties and crystal forms

The most common include: purple lepidolite

and much of the black Onyx on the market has been artificially colored

white and occasionally gray or brown

Botswana Agate 16mm A Grade Coin Cabochon Mandrel and is a result ofBotswana Agate displays highly defined parallel banding, usually in white on hues of brown, gray, pink, tan, apricot and purplish red. Botswana Agate was formed nearly 187 million years ago by lava flowing in waves from long faults in the earth. This lava rolled across the landscape, depositing layer upon layer of Quartz silicate to create the banding and patterns now prized in Botswana Agate. Sold individually. These cabochons are all unique and vary