Black Obsidian Dragonhead | 216g Blue Aventurine Weight: 97g Size: 50mm x

Weight: 97g Size: 50mm x 52mm

Bead Measurement: 9mm (approximate)

Weight: 75g  Size: 52mm x 34mm x 30mm

It is known to work slowly

Black Obsidian Dragonhead | 216g Blue Aventurine Weight: 97g Size: 50mm xWeight: 216g Size: 99mm x 48mm x 50mm (All measurements are approximate.) BLACK OBSIDIAN STRENGTH PROTECTION GROUNDING TRUTH TRAUMA Source(s): United States, Canada, Mexico, Guatemala, Argentina, Chile, Greece, Hungary, Italy, Iceland, Russia, New Zealand, Japan, and Kenya. Mineral: As a volcanic glass, obsidian resembles a mineral, but it's not a true mineral because its composition is too complex and lacks the typical mineral crystalline structure.