Lavender purple sapphire is a delicate variety of corundum displaying pastel hues ranging from pinkish-lilac to light violet. Its captivating color, softer than intense purple, is caused by the presence of titanium and iron in its crystal structure.
9硬度（满分10）
Heat TreatmentHeat treatment is very common for lavender sapphires. It improves color by removing unwanted secondary tones and intensifying the lavender hue. This treatment is permanent and widely accepted in the market.
Untreated (Natural)Untreated lavender sapphires are rarer and typically command a price premium of 30 to 100% over heated stones of comparable quality. They should be accompanied by a certificate from a reputable laboratory (GIA, GRS, SSEF).
Diffusion TreatmentLess common treatment that introduces coloring elements at the surface or deeper. This treatment must be disclosed as it significantly affects the stone s value.
