Botswana Agate 8mm Round - Large Hole Beads Points One of the best-known physical

One of the best-known physical properties of topaz is its hardness

gray and black

is a lab-made form of zirconium dioxide

bubbles and crystal to rich layers that form as lava flows onto the surface of stone — and can look very different depending on how that lava erupts

Botswana Agate 8mm Round - Large Hole Beads Points One of the best-known physicalBotswana 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.