4.62ct Australian Quilpie Boulder Opal Freeform Pear Cabochon #E303 Spinel 72mm Origin Tanzania Shape round 72mm Origin Tanzania Shape round brilliant cut Material Grade AAA Colors deep purplish blue Treatments Enhancements heat Israel's national stone 13mm at thickest point Dimensions (inches) 0 20" at thickest point Body Tone (+N1 to N9 ) N A Boulder Opal Brightness ( 1 to 5+) B7 Predominant Colors Dominant blue and pink overtones with green and purple undertones Directionality of Fire Very Slightly Directional Treatments Enhancements None Suggested Purpose Ring or Pendant Sku Number #E303 Additional Notes Carat weight may vary slightly depending on environmental humidity