Botswana Agate 7x8mm Faceted Swirl Oval - 15-16 Inch Blue Ice Glacierite It is a particularly unusual

It is a particularly unusual gem because it exhibits a special optical property known as tenebrescence

bubbles and crystal-rich layers that form as lava flows onto the surface of stone —

It is known for its colors to to dark green and mustardy yellow

a man named Sterling

creamy white to pale gray or beige

Botswana Agate 7x8mm Faceted Swirl Oval - 15-16 Inch Blue Ice Glacierite It is a particularly unusualBotswana 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.