Sapphire Description as provided by GRS: GRS Report Nr……………GRS2025-127288 Species……………………………..Natural Corundum Cutting style..........………..Modified Brilliant Cut Color.............................…….Blue Saturation………………………..Deep-Intens Weight………………………………4.31 ct. Shape…………………………… Cushion Clarity…………………………….Slight Measurements…………………………8.55 x 8.53 x 5.60 mm Geographic Origin ..............Sri Lanka Treatment………………………………..:..Untreated/ Unheated Certified By………………. Gemresearch Swisslab (Scan provided QR-Code) This 1 piece of a natural sapphire has Deep- Rich Blue Colour and weights 4.31 carats was selected by Lorina and sent to Gemresearch Swisslab GRS Laboratory in Meggen, Switzerland. The accompanying GRS Report # GRS2025-127288 authenticates this gemstone as a "Natural Sapphire". Color “Dark Blue” with a comment stating "No indication of thermal treatment". Country of Origin is an opinion offered by the seller of the 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.