Vita-Obsidian-8mm Details Vita-Obsidian-8mm Unavailable $120.00 Default Title - $120.00 Select options 8mm diameter (approx 5/16) with 14g hinge closure. Obsidian PVD-fused black from Tether JewelryRead more 8mm diameter (approx 5/16) with 14g hinge closure. Obsidian PVD-fused black from Tether Jewelry Share