Original Star Kâ„¢ 7mm Heart Simulated Tanzanite Earring Studs. The dazzling Original Star Kâ„¢ 7mm Heart Simulated Tanzanite Earring Studs, crafted in 925 Sterling Silver. This amazing design is mounted with 2 stones prong set violet Heart Shape Simulated tanzanite eye clean clarity. This style measures 7.00 mm wide, 7.00 mm long. And buy this Original Star K 7mm Heart Simulated Tanzanite Earring Studs Was $99.99 Now $39.99.