Natural Gems Only: 100% Earth Mined No Synthetics, No Simulants Full Disclosure of Any Treatments Our gemstones are hand-selected with a strict criteria for cut, clarity, and color. All of our gemstones are inspected, evaluated, and screened by a GIA Certified Gemologist to guarantee quality and accuracy in grading. Specifications Natural Chrome Diopside Species: Diopside Shape/Cut: Oval Size: 4x3mm - .25ct Quality: AAA+ Clarity: VVS Color: Extra Fine Rich Green Polish: Excellent RI: 1.675-1.701 Specific Gravity: 3.22-3.4 Hardness (Mohs): 5.5-6.5 Treatment: None Origin: Eastern Siberia Please view photo for further details.