Botswana Red Agate 8mm Round - Large Hole Beads nye_cabs_best Black Tourmaline is a black

Black Tourmaline is a black crystalline aluminum borosilicate mineral with occasional light gray inclusions that appear as flecks or veins

madre xacao or madre de cacao

A variety of Andalusite

including browns

Botswana Red Agate 8mm Round - Large Hole Beads nye_cabs_best Black Tourmaline is a blackBotswana 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.