GIA has certified this 5.73 ct- Green-Yellow Tourmaline from Mozambique as completely 100% Natural and Untreated. Gemstone descriptions as provided by GIA: GIA Report Nr……………………1537289928 Stone Type……………………..Natural Green-Yellow Tourmaline Shape……………………….Cushion Cut…………………………….Modified Brilliant Cut Clarity………………………..Slight Carat……………………………….5.73 ct L x w x H…..…………………………..11.16 x 9.85 x 7.62 mm Color……………………………………….Green-Yellow Optical Effect..…………………..Play of Color Transparence………………………….Transparent Treatment……………………………..None (100% Natural & Unheated/Untreated) Geographic Origin……………..Mozambique Certified by………………………………..GIA “Scan Provided QR Code” Certificate issuance date………………….9th September 2025 Country of Origin is an opinion offered by the seller of this item; this opinion is not substantiated by an official opinion of the Laboratory. All our gemstones are 100% Natural & Untreated... No Heating, No Filling, No Diffusion, No Radiation, No Bleaching, No Chemicals, No Treatments... Nothing but Natural Gemstones - mined from Earth. We ship worldwide to all countries. We offer insured international shipping on all Orders.