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1.21CT ROUND BRILLIANT TANZANIAN SAPPHIRE, TEAL SPRING GREEN, 5.99X4.39MM, UNTREATED. Some abrasions on the girdle, visible with magnification. Internal rust-colored mineral inclusions, pretty unique! Totally natural/untreated with a lovely teal green.

About Heat Treatments: Some colored gemstones are routinely heated for color and clarity improvement. This is a permanent treatment and typically only involves heat and not chemicals. The treatment mimics what the earth does naturally to gemstones as they reach the surface. If the stone says "Unheated," it is not treated in any way.