09 July, 2024 ALGT Report Number 88408230 IDENTIFICATION Species ................................................................................ Natural Zoisite Variety ............................................................................................ Tanzanite DESCRIPTION Shape & Cutting Style ............................................... Oval, Mixed Cut Measurements ............................................ 17.67 x 13.80 x 9.93 mm Carat Weight ........................................................................... 19.84 Carat Color .............................................................. Vivid/Deep Blue (Purplish) Transparency ......................................................................... Transparent ADDITIONAL GRADING CHARACTERISTICS Color Quality Grade ................................................. Fine Color Quality Suggested Origin ....................................................................... Tanzania COMMENTS Tanzanite is commonly heated at low temperature to improve its color. There is currently no scientific method available to determine whether this gemstone has been enhanced or not. Minor amount of oil in fissures. Oiling has become common practice in trade for many gemstones. This enhancement is reversible at any time.