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and over time
They are all varieties of the mineral corundum
Our Jade is one of two mineral varieties -- nephrite
which may contain iron oxide
Botswana Agate 8mm Round - 8-Inch 40x60mm and over timeBotswana 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.
