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Labradorite: The Enigmatic Iridescent Gemstone
Labradorite is a captivating gemstone renowned for its stunning play-of-colour, known as labradorescence. This phenomenon creates a mesmerising display of iridescent hues when viewed from different angles, making labradorite a gemstone of great interest to both scientists and enthusiasts alike. Shop Labradorite Here Properties of Labradorite Labradorite belongs to the feldspar group, specifically the plagioclase series, and is composed of calcium, sodium, aluminium, and silicon. Its chemical formula is (Ca,Na)(Al,Si)₄O₈, with calcium and sodium content varying between 50-70% and 30-50%, respectively. The mineral typically exhibits a hardness of 6 to 6.5 on the Mohs scale and has a specific...
The Enchanting World of Velvet Malachite: A Congo Treasure
Velvet malachite, a stunning variety of malachite, is renowned for its silky, fibrous texture and vibrant green colour. This exquisite mineral is primarily found in the Democratic Republic of Congo, particularly in the Kolwezi mining district of the Lualaba province. Let's delve into the fascinating world of velvet malachite and explore its unique characteristics, formation, and uses. Shop Velvet Malachite Here Formation and Characteristics Velvet malachite forms through the secondary mineralisation of copper deposits. It occurs in the oxidised zones of these deposits, where copper minerals undergo chemical reactions with water and carbon dioxide. This process leads to...
Olivine Basalt Slice from Kīlauea Volcano, Hawaii: A Geological Marvel
Imagine holding a piece of Earth’s fiery heart in your hands. That’s what it’s like to possess an olivine basalt slice from the Kīlauea Volcano in Hawaii. Kīlauea, one of the most active volcanoes on Earth, has been erupting almost continuously since 1983. It produces vast rivers of molten lava that cool and solidify into basalt rock. Among these, olivine basalt stands out due to its high content of the mineral olivine, which gives it a striking green hue. This unique rock provides an exceptional opportunity for volcanologists and geologists to study volcanic processes and the minerals formed during...
Exploring the Wonders of Cave Calcite in Mexico
Mexico is home to some of the most extraordinary geological formations, and among these, cave calcite stands out for its beauty and scientific significance. Found in various limestone caves across the country, cave calcite formations offer a glimpse into the Earth’s geological processes and history. Geological Formation and Characteristics Cave calcite, primarily composed of calcium carbonate (CaCO₃), forms through the slow deposition of calcium-rich water dripping from cave ceilings. Over time, these deposits create stunning formations such as stalactites, stalagmites, and flowstones. The Naica Mine in Chihuahua, Mexico, is one of the most famous sites for cave calcite, particularly known for...
Glimmering Treasures: The Enchanting Selenite of Mount Gunson Copper Mine.
Selenite, a variety of the mineral gypsum, is known for its transparent to translucent crystals that can form in a variety of shapes. One notable locality for selenite is the Mt Gunson Copper Mine in South Australia. Mt Gunson Copper Mine is located near Pernatty Lagoon on the Stuart Shelf in South Australia. The mine is part of a larger geological formation known for its rich deposits of copper and other minerals. The selenite found here is often associated with the copper deposits, which can influence its coloration and crystal formation. Selenite from Mt Gunson is highly prized by mineral collectors...
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