Rainbow Obsidian Heart Pendant 30mm — Gold Paperclip Chain Stone Pendant Nephrite has a reputation as

Nephrite has a reputation as one of the toughest natural stones on earth

bloodstone

60mm and 323g

around 13 to 15mm tall and 1

Why offer the same carving in so many stones

Rainbow Obsidian Heart Pendant 30mm — Gold Paperclip Chain Stone Pendant Nephrite has a reputation asA chunky rainbow obsidian heart carved from genuine volcanic glass and hung on a modern gold paperclip chain. Held still it reads as deep black, but tilt it toward the light and bands of green, soft purple and smoky gold radiate outward from the centre in a heart within heart pattern. That effect is the whole point of rainbow obsidian, and it only shows properly when the carving is oriented correctly during shaping. What actually causes the colours?