Natural Blue-Green Bi-Color Tourmaline Faceted elongated Octagon Shape. Top color - Clean clarity. Weight - 3.75 ct Size - 20.70 x 4.73 x 3.80 mm. Clarity - transparent, clean clarity - very rare. Color - Vivid/Deep green-blue. Exceptionally rare color. Treatment - Natural. Heated or not can't be determined, hence, it is not mentioned in the report. Certification: ALGT Belgium certificate no: 00496366. A top rare gem - great size - amazing fire and luster - top rare colors - excellent cut - clean clarity. Shipment: Trackable and Insured. Duties and Taxes: Buyer's responsibility. IMPORTANT. Pictures were taken under white light and natural daylight with magnification to display as accurately as possible. Tried our best to capture as many real colors as possible, but they may slightly differ.