No reserve price Violet, Blue Tanzanite - 3.58 ct - International Colored Gemstone Association (ICA GemLab) - No Heat Tanzanite

This violet-blue tanzanite, weighing 3.58 carats and certified by the International Colored Gemstone Association (ICA GemLab), is notable for its natural color without heat treatment. Tanzanite is a strikingly beautiful and rare gem found exclusively in Tanzania, prized for its vibrant trichroic colors that display blue, violet, and burgundy tones depending on the viewing angle. Heat treatment is commonly used to enhance or modify tanzanite’s color, so no heat treatment suggests this stone's color occurs naturally, adding to its rarity and value. The stone's moderate hardness (Mohs 6.5-7) requires care in jewelry settings but affords excellent luster and brilliance. Tanzanite became popular in the late 20th century and is considered a modern classic, appealing to collectors and those seeking unique colored stones with fascinating optical properties.