Kunzite

Hardness: 6.5-7 on Mohs scale. Color: Pale pink to light violet with pleochroism (appears different colors from different angles). Luster: Vitreous/Glassy. Crystal Structure: Monoclinic. Cleavage: Perfect in two directions. Specific Gravity: 3.1-3.2.

Kunzite is formed in lithium-rich granitic pegmatites. These pegmatites are very coarse-grained igneous rocks that form during the final stages of a magma's crystallization. The slow cooling rates allow for the growth of large crystals. Its formation is typically associated with the late-stage hydrothermal activity in these pegmatite intrusions, often alongside other gems like tourmaline and beryl. Geological age varies depending on the specific pegmatite deposit, ranging from hundreds of millions to billions of years old.

Kunzite is primarily used as a gemstone in jewelry, valued for its delicate pink to lilac color and good transparency. It is often cut into faceted gems for rings, earrings, pendants, and bracelets. Due to its perfect cleavage and heat sensitivity, it requires careful handling during cutting and setting.

Kunzite was first discovered in 1902 in Pala, California, and was named after George Frederick Kunz, a renowned mineralogist and gemologist for Tiffany & Co. It is known for its strong pleochroism and can fade in direct sunlight, so it is often recommended for evening wear. Some kunzite can exhibit phosphorescence or fluorescence under ultraviolet light.

Kunzite can be identified in the field by its distinct pink to violet color, perfect cleavage, and often large, prismatic crystal habit within pegmatites. It is commonly found in countries with significant pegmatite deposits, including Afghanistan, Brazil, Madagascar, Pakistan, and the United States (California). Collectors can look for its characteristic color and crystal form in pegmatite matrices. Care should be taken to protect it from prolonged sun exposure due to its tendency to fade.