Soho Obsidian - Silver RingDramatic & stunning black the perfect chameleon to go with any colour, pattern or style. Obsidian is formed from molten lava that has cooled very quickly, it is often called 'volcanic glass' with the elements of fire, water and earth at its core. The glass jewel is elegantly encased on two sides in a modern, squared off sterling silver setting. 14mm x 12mm x 7mm with subtle variations by nature of handmade process. Available in 3 sizes L 6 (15mm