Origin: Coober Pedy, Australia Opal Type: Crystal Opal Shape: Oval Color: Pink / Green / Blue Pattern: Iris Transparency: Translucent Brightness rating (1-5): 3 Size (mm): 16x11.5x3 Weight (ct): 3.70 MOHS Hardness: 5.5 - 6.5 Treatment: Non-treated GbG ID: CY14