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At that time yellowish gems were called "topaz" in many parts of the world
It is mined under extremely harsh conditions and the high-grade specimens are more rare than diamonds
The opaque stone’s red color is due to high iron content
It is often thought of as an all-black stone
5 inches (12
Botswana Agate 4mm Round - 8-Inch Tourmalinated At that time yellowish gemsBotswana 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.