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Mix size • 41pcs

Tanzanite is a blue-to-violet variety of the mineral zoisite, known for its striking color and rarity, as it's only found in Tanzania. It displays a unique phenomenon called pleochroism, meaning its color can appear different when viewed from various angles. This pleochroism is typically enhanced through heat treatment to minimize brown tones and deepen the blue and violet hues.

Here's a more detailed description:

Color: Tanzanite's color ranges from pale blue to intense ultramarine, often with violet undertones. The intensity and specific shade can vary based on the angle of observation due to its pleochroic nature.

Pleochroism: This optical property means that tanzanite can exhibit different colors when viewed from different directions. Typically, it shows three colors: blue, violet, and a reddish-brown. Heat treatment can modify this, often aiming to maximize the blue and violet hues.

Rarity and Origin: Tanzanite is exclusively found in a small area in Tanzania, near Mount Kilimanjaro. This limited geographic origin contributes to its value and desirability.

Hardness: Tanzanite rates 6.5 to 7 on the Mohs scale of hardness, which is less hard than some other gemstones like sapphire. This means it requires careful handling to avoid scratches or damage.

Treatment: Most tanzanite on the market has been heat-treated to enhance its color. This process typically involves heating the stone to around 400-600°C to minimize brown tones and deepen the blue and violet hues.

Other Names: Tanzanite is also sometimes referred to as the "December birthstone" or as a substitute for sapphire due to its blue color