Lilac purple sapphire is a delicate variety of corundum displaying pastel hues ranging from pale lilac to pinkish violet. Its captivating and soft color is primarily caused by traces of titanium and vanadium in its crystal structure, creating a unique and highly sought-after shade.
9硬度（满分10）
Heat TreatmentHeat treatment may be applied to even out the lilac color and eliminate uneven color zones. Less common for lilac sapphires than for other varieties as many naturally have beautiful color. This treatment is permanent and accepted in the market.
Untreated (Natural)Untreated lilac purple sapphires are relatively more common than for other sapphire colors, as many naturally possess beautiful pastel hues. They nevertheless command a price premium of 40 to 120% over heated stones of comparable quality. Laboratory certification recommended (GIA, GRS, SSEF).
Diffusion TreatmentRare treatment for lilac sapphires that introduces coloring elements. Must be disclosed as it significantly affects the stone's value. Rarely used for this variety due to the natural beauty of lilac colors.
