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Dimensions:

11.9 x 11.8 x 6.6 mm

11.9 x 11.8 x 5.8 mm

Tanzanite is a blue-violet variety of the mineral zoisite, known for its strong trichroism (exhibiting three colors), and is found only in the Merelani Hills of Tanzania.

Here's a more detailed description of tanzanite:

• Mineral: Zoisite.

• Color: Tanzanite is known for its blue-violet hues, but it can also display shades of blue, violet, and even burgundy depending on the crystal's orientation, a phenomenon called trichroism.

• Discovery: Tanzanite was discovered in 1967 in the Merelani Hills of Tanzania, near Mount Kilimanjaro.

• Rarity: It is a relatively rare gemstone, found in only one place on Earth.

• Pleochroism/Trichroism: Tanzanite exhibits strong pleochroism, meaning it displays different colors when viewed from different angles.

• Hardness: Tanzanite has a Mohs hardness of 6.5 to 7, making it relatively durable but still susceptible to scratches.

• Heat Treatment: Tanzanite is often heat-treated to enhance its blue-violet color.

• Tiffany & Co: Tiffany & Co. played a key role in bringing tanzanite to market, naming it and promoting its unique beauty.

• Birthstone: Tanzanite is a birthstone for December.