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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...
Horodyskia - An Ancient Mesoproterozoic Fossil from Australia
Horodyskia is an ancient fossilised organism discovered in rocks dating back to the Mesoproterozoic era, approximately 1.4 billion years ago. As one of the earliest known complex multicellular organisms, it represents a significant find in palaeobiology. This article explores the significance of Horodyskia and its implications for understanding early life on Earth. Shop Horodyskia Here The Mesoproterozoic Era The Mesoproterozoic era, spanning from 1.6 to 1.0 billion years ago, was a critical period in Earth's history when multicellular life began to emerge. Among the notable fossils from this era is Horodyskia, found in sedimentary rocks from the Gascoyne region of...
The Fascinating Rock Formations of Australian Antarctic Territory: Almandine Garnet, Quartz, and Biotite
The Vestfold Hills, located near Davis Station on the Ingrid Christensen Coast of Princess Elizabeth Land in the Australian Antarctic Territory, are a fascinating site for geological exploration. This region in Eastern Antarctica is home to rock formations that include Almandine Garnet, Quartz, and Biotite, offering a unique window into the Earth's geological processes.Almandine Garnet is a type of garnet that stands out due to its deep reddish-brown color. It is known for its hardness and durability, which make it a valuable gemstone. Almandine garnets form under high-pressure and high-temperature conditions, often found in metamorphic rocks like schist and gneiss.Quartz...
Dioptase: The Emerald of the Desert
Dioptase, often hailed as the "Emerald of the Desert," is a mesmerising gemstone that captivates with its vivid green hue and brilliant sparkle. This rare mineral has intrigued gemologists and collectors alike, not just for its beauty, but for its intricate formation process and unique chemical composition. Let’s delve deeper into the fascinating world of dioptase. Chemical Composition and Structure Dioptase is a copper cyclosilicate mineral, with the chemical formula CuSiO₃·H₂O. Its crystal structure consists of rings of silicate tetrahedra (SiO₄) linked by copper ions (Cu²⁺), forming a complex three-dimensional framework. The presence of these copper ions is what gives...
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...
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