Spinel Archives - Danu Group

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Spinel

Spinel is the magnesium–aluminum member of the larger spinel group of minerals with chemical formula MgAl₂O₄. Spinel is actually a large group of minerals. Gahnite, hercynite, ceylonite, picotite, and galaxite are all part of the spinel group.

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Danu Group is a Sri Lanka–based gemstone company specializing in natural rough and cut gemstones sourced directly from traditional mining regions. Our work connects the origin of each stone with careful selection, skilled craftsmanship, and transparent representation. Every gemstone reflects a journey — from earth to hand — guided by experience, integrity, and respect for nature.

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Natural Blue Sapphire Vivid Blue "Royal Blue"

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Natural Blue Sapphire Vivid Blue "Royal Blue"

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$Ceylon Natural Pink Sapphire Colour : Pink Shape : Oval Weight : 0.86 Cts Dimension : 6.1 x 4.9 x 3.3 mm Treatment : Unheated Clarity : VS Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminum oxide with trace amounts of elements such as iron, titanium, chromium, copper, or magnesium. Sapphire deposits are found in Eastern Australia, Thailand, Sri Lanka, China, Vietnam, Madagascar, Greenland, East Africa, and in North America in mostly in Montana. Madagascar, Sri Lanka, and Kashmir produce large quantities of fine quality Sapphires for the world market. Sapphires are mined from alluvial deposits or from primary underground workings. Blue Sapphire and Ruby are the most popular Gemstone in Corundum Family. also, Orangy Pink Sapphire is called Padparadscha. The name Drive's from the Sinhalese word "padmaraga" " පද්මරාග", meaning lotus blossom, as the stone is of a similar color to the lotus blossom. Bi-Color Sapphire from DanuGroup Collection Also, Sapphire can be found as parti-color, bi-color or fancy color. Australia is a main parti-color Sapphire producer. White Sapphire also, White sapphire is a very popular stone to wear instead of Diamond as a 3rd hardness gemstone after diamond ( moissanite hardness is 9.5). Various colors of star sapphires A star sapphire is a type of sapphire that exhibits a star-like phenomenon known as asterism. Also, A rare variety of natural sapphire, known as color-change sapphire, exhibits different colors in a different light. Sapphires can be treated by several methods to enhance and improve their clarity and color. A common method is done by heating the sapphires in furnaces to temperatures between 500 and 1,850 °C for several hours, or by heating in a nitrogen-deficient atmosphere oven for 1 week or more. Geuda is a form of the mineral corundum. Geuda is found primarily in Sri Lanka. It's a semitransparent and milky appearance due to rutile inclusions. Geuda is used to improve its color by heat treatment. Some geuda varieties turn to a blue color after heat treatments and some turn to red after oxidizing. Also, Kowangu pushparaga turns to yellow sapphire after oxidizing. Sapphire Crystal system is a Trigonal crystal system with a hexagonal scalenohedral crystal class. Sapphire hardness is 9 according to the Mohs hardness scale with 4.0~4.1 specific gravity. Refractive index ω =1.768–1.772 nε =1.760–1.763 Solubility = Insoluble Melting point = 2,030–2,050 °C Birefringence = 0.008 Pleochroism = Strong Luster = Vitreous Sapphire is the birthstone for September and the gem of the 45th anniversary. Healing Properties of Sapphire Sapphire releases mental tension, depression, unwanted thoughts, and spiritual confusion. Sapphire is known as a "stone of Wisdom". It is exceptional for calming and focusing the mind, allowing the release of mental tension and unwanted thoughts. Sapphire is also the best stone for awakening chakras. Dark Blue or Indigo Sapphire stimulates the Third Eye chakra. Blue Sapphire stimulates the Throat Chakra. Green sapphire stimulates Heart Chakra. Black Sapphire stimulates Base Chakra. White sapphire stimulates Crown Chakra. Yellow sapphire stimulates Solar Plexus Chakra. Pink Sapphire Healings Pink Sapphire reflects the Light of the heart and love and stimulates the Heart Chakra, located near the center of the breastbone. It is believed that pink sapphires used for therapeutic purposes as crystals might nourish the emotional well-being of the person wearing the jewelry crafted from the gems. The theory behind these therapeutic beliefs centers on clearing emotional blockages from the past to release hurtful experiences. Pink Sapphire helps strengthen and balance the heart. It is also useful in balancing blood sugar, glucose metabolism and in cases of diabetes, hypoglycemia, and hyperglycemia. • Nourishing the Emotional Body with the PinkColor Ray • Energetic Columns of Support • Longevity and Extending the Lifespan of Your Cells • Astral Vision and Sensitivity to Energy$

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Ceylon Natural Pink Sapphire

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NATURAL BLUE SAPPHIRE Colour : Vivid Blue Shape : Cushion Weight : 1.02 CTS Dimension : 6.5 x 6.1 x 3.4 mm Treatment : Heated Clarity : SI • CSL - Colored Stone Laboratory Certified ( GIA Alumina Association Member ) • CSL Memo No : EFDE93792350 蓝宝石重量 : 1.02 卡拉尺寸 : 6.5 x 6.1 x 3.4 mm 颜色 : 蓝色透明 : 好透明形状 : 垫形治療：加熱清晰度 : SI

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NATURAL BLUE SAPPHIRE

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ceylon natural dark bluesapphire kaka nil

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Ceylon Natural Dark Blue Sapphire - Kaka nil/ කාකනිල්

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