Ice Obsidian 13x18mm Rectangle - 8-Inch 5mm Light Blue Matrix thought to be derived from

thought to be derived from trace amounts of titanium

Specialists soak the stones in resin or liquid plastic to help harden them

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

It is a translucent to transparent stone with a soft pale pink to rose red hue

red jasper and black hematite

Ice Obsidian 13x18mm Rectangle - 8-Inch 5mm Light Blue Matrix thought to be derived fromIce Obsidian is a light brown to green to gray volcanic stone. Obsidian is formed when felsic lava cools without crystal growth. It is sometimes used for scalpel blades in cardiac surgery, as Obsidian can be formed into a blade many times sharper than steel surgical blades.