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Dunilite

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Dunilite is a rare olivine group mineral with the corresponding chemical formula Magnesium, Iron, Manganese, Silicate (Mg,Fe,Mn)2SiO4. Long mistaken for green peridot , dunilite was identified in 2000 as a new gem variety from the olivine group. Dunilite- Discovered by Mr. Dunil Palitha Gunasekera in 1996. Dunil Palitha Gunasekera Dip. Gem, FGA,- President Crystals Gallery -Gem Lab Dunilite occurs in only one locality called, “Katukubura mountain” Kolonne , Sri Lanka. Dunilite can be found in colours light greenish-yellow to brownish green, the depth of colour being related to the iron content of the stone. • Group : Olivine • Crystal System : Orthorhombic • Lustre : Vitreous • Fluorescence : None • Hardness : 6 1/2 • Fracture : Uneven • Cleavage : None • Specific Gravity : 3.48 • Optic Sign : Biaxial (-) • Dispersion : 0.020 • Transparency : Transparent to translucent • Habit : Tabular, rectangle shaped aggregate crystals. • Refractive Index : a= 1.677, B=1....
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Rare Natural Double Terminated Green Sapphire Complete Crystal with Amazing Growth Marks & Half Crystal

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  Rare Natural Double Terminated Green Sapphire Complete Crystal with Amazing Growth Marks & Half Crystal • COMPLETE CRYSTAL Colour : Army Green Weight : 4.90 Cts Dimension : 17.3 ( 1.7 cm ) x 6.5  x 5.6 mm Shape : Trigonal Crystal Clarity : Visible Inclusions Variety : Natural Green Sapphire Species : Natural Corundum Origin: Deniyaya, Sri Lanka 🇱🇰 Treatment : Unheated / Natural Comment: Visible very interesting natural growth marks Type : Loose faceted stone • HALF CRYSTAL Colour : Army Green Weight : 2.05ct Dimension : 10.2 (1 cm) x 6.2 x 4.1 mm Shape : Trigonal Half Crystal Clarity : SI Variety : Natural Green Sapphire Species : Natural Corundum Origin: Not identified Treatment : Unheated/ Natural Type : Loose faceted stone   Click here for More info  
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Serendibite

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Serendibite is an extremely rare silicate mineral that was first discovered in 1902 in Sri Lanka by Dunil Palitha Gunasekera and named after Serendib, the old Arabic name for Sri Lanka. Serendibite can be found in colors such as pale yellow, blue-green, greyish blue, black. It can be found in Sri Lanka, USA, Canada, Madagascar, Tanzania, Russia, Myanmar. In Sri Lanka, Specially from Kurunegala, Ratnapura, Embilipitiya, Kolonna. • Chemical Formula : (Ca,Na)2(Mg,Fe2+)3(Al,Fe3+)3[O2|(Si,Al,B)6O18] • Elements listed: Al, B, Ca, Mg, O, Si • Common Impurities : Ti,Fe,Mn,Na,K,F,H2O,P • Lustre: Vitreous • Hardness : 6½ - 7 • Specific Gravity : 3.42 - 3.52 • Crystal System : Triclinic • Density: 3.42 - 3.52 g/cm3 (Measured) • RI values : nα = 1.701 nβ = 1.703 nγ = 1.706 • Pleochroism : Strong; X = pale yellow, yellow-green to blue-green; Y = almost colorless, pale yellow, blue, blue-green; Z = light to dark blue. • Category : Inosili...
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Rare Crystal Type Sixling - Ceylon Natural Chrysoberyl Crystal

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An interesting feature of Chrysoberyl crystals is the cyclic twins called trillings . ( sixling ). It can be found only one among millions of gemstones . Chrysoberyl crystal from Danu Group Old Collection This complete " sixling " crystal has been found from the city of gem Ratnapura , Sri Lanka Mining Type: Underground mining with tunnels Gem Deposit : Alluvial Gem Deposit Found: Danu Group Dimension : 12.5mm x 10mm x 5mm Type : Complete sixling Variety : Chrysoberyl Species : Chrysoberyl Complete Crystal This crystal is very important healing crystal type who works with chrysoberyl for crystal therapy and crystal treatments. Because Its vibrational energies and other energies are higher than cut gemstones . Twinned crystals have a  hexagonal  appearance. It is spread in six directions. It also can be seen twin orientations like " V"-shaped twin. ...
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Location: United Kingdom
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Chrysoberyl

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The Gemstone Chrysoberyl is an aluminate of beryllium with the chemical formula Be Al₂O₄. The name chrysoberyl is derived from the Greek words "chrysos" and "beryllos". Its meaning is "a gold-white spar". It is known as a hard and durable gem after Sapphire . Chrysoberyl is an orthorhombic crystal mineral with 3.5 – 3.84 specific gravity and 8.5 hardness according to the Mohs hardness scale . It is a Biaxial (+) mineral with refractive indexes nα=1.745 nβ=1.748 nγ=1.754. Chrysoberyl can be found colours such as green , yellow , brownish to greenish-black, colourless, pale shades of yellow , greenish Yellow , Yellowish Green , Honey Brown , Reddish Brown, Orangy yellow, Greenish Brown, Blue. Also, Golden Yellow Chrysoberyl is called "Ceylonese Chrysolite" as a trading name. The Chrysoberyl Alexandrite is a colour change variety upon the nature of ambient lighting. It changes the colour...
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Zircon

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Zircon  is nesosilicates group mineral. Its corresponding chemical formula is  ZrSiO4 . The name derives from the Persian zargun, meaning "gold-hued". Zircon is a popular gemstone that has been used for nearly 2000 years. The crystal structure of zircon is a tetragonal crystal system with 7.5 hardness according to the Mohs Hardness scale. Zircon is also very resistant to heat and corrosion and known as Insoluble gemstone . This Uniaxial (+) mineral Specific gravity is 4.6–4.7. It's heavy more than such as Sapphire , chrysoberyl , Garnet , spinel . Gem Businessmen use these physical properties to identify zircons from other gemstones . Zircon has weak pleochroism and has colours such as Colorless , Very Strong Blue To Green-Blue, Yellow , Blue-Green , Yellowish Green , Yellow-Green, Brown , Orangy Yellow To Reddish Orange, Dark Brownish Red, Sometimes Purple, Gray To Bluish Gray, Brownish Gray. Colourless specime...
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Location: United Kingdom
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