Diaspore is a mineral composed of aluminum oxide and hydroxide, often found in metamorphic rocks. It typically appears as colorless, white, or yellowish crystals and has a pearly to vitreous luster. Diaspore is known for its unique property of changing color when heated, a phenomenon called thermochromism. This mineral is primarily located in regions with high-temperature and high-pressure conditions, such as Turkey and Hungary. Diaspore is sometimes used in the production of aluminum and as a gemstone in jewelry due to its attractive appearance and rarity.