Dioptase Crystal Naturally Terminated Namibia Africa 215g

Dioptase Crystal Naturally Terminated Namibia Africa 215g

Mineral Name: Dioptase Chemical Formula: Cu6[(OH)2|Si6O18]·6H2O - Copper Silicate Hydroxide Color: Dioptase is well-known for its vibrant emerald-green to bluish-green color. The intense green hue is a result of copper impurities within the crystal lattice. Crystal System: Trigonal Hardness: 5 on the Mohs scale Luster: Vitreous to subadamantine Transparency: Transparent to translucent Specific Gravity: 3.28 - 3.35 Cleavage: Poor Fracture: Conchoidal to uneven Streak: White Occurrences: Dioptase is commonly found in oxidized copper deposits, often in association with minerals like malachite, azurite, and chrysocolla. Significant deposits have been discovered in regions such as the Democratic Republic of Congo, Kazakhstan, Tsumeb in Namibia, and Arizona in the United States. Notable Localities: Noteworthy occurrences include the Tsumeb Mine in Namibia, the Altai Mountains in Kazakhstan, and the Christmas Mine in Arizona, USA. Formation: Dioptase typically forms in the oxidized zones of copper deposits where copper-rich fluids react with silica-rich rocks. The trigonal crystal structure of dioptase results in the development of well-formed rhombohedral crystals and crystalline aggregates. Unique Features: Dioptase is recognized for its stunning green color, often displaying remarkable transparency. Crystals are typically small, forming as rhombohedral or prismatic shapes, and may occur as individual crystals or as aggregates. Dioptase is known for its exceptional vitreous to subadamantine luster, enhancing its overall aesthetic appeal. Uses: Dioptase is primarily sought after by mineral collectors and enthusiasts due to its striking color and crystal formations. Its rich green hue and relative rarity make it a prized addition to mineral collections. While not commonly used in jewelry due to its softness, dioptase specimens are treasured for their ornamental and aesthetic value. Caution: Dioptase is a relatively soft mineral, and care should be taken to avoid scratching or damaging specimens. Additionally, exposure to prolonged sunlight may cause fading of the vibrant green color, and dioptase should be stored in a cool, dark environment to preserve its appearance.