Ruby Zoisite 6mm Round Faceted - Large Hole Beads #9183 creating a unique "marbled" look

creating a unique "marbled" look

It is composed of silicon dioxide

one of the first known to man

Australian Butter Jasper is a relatively new variation of Jasper that definitely meets that criteria

It is opaque

Ruby Zoisite 6mm Round Faceted - Large Hole Beads #9183 creating a unique "marbled" lookRuby Zoisite occurs naturally when small Ruby crystals become embedded within Zoisite. The Ruby inclusions in this stone are pink to reddish purple to dark purple, while the Zoisite is light to medium green. Ruby has long been considered one of the most beautiful and valuable gemstones on the planet. It is also one of the hardest, second only to Diamond. At times in ancient history, Ruby was valued more highly than any other gem, including Diamond.