Corundum

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The Rosser Reeves star ruby.Reputed one of the finest in the world, this 138.7 carat beauty graces t

Link #asterism #mineral #mineralogy #mineralmonday #crystal #needle #corundum #the earth story #cabochon #smithsonian #gemmology #gemstone

gemineral:CorundumLocality: Sri Lankavia KosnarGemCo on Etsy

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corundum

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hematitehearts:Ruby and ZoisiteLocality: Longido, Arusha Region, Tanzania (United Republic)

Link #corundum #aluminum #hexagon #symmetry #geology #mineralmonday #watermelon #the earth story

hematitehearts:Ruby and ZoisiteLocality: Longido, Arusha Region, Tanzania (United Republic)

Link #corundum #aluminum #hexagon #symmetry #geology #mineralmonday #watermelon #the earth story

Etch star on ruby crystal.Whether natural or synthetic, ruby crystals have shapes on their surface.

Link #crystal #corundum #nikon #microscope #photomicrograph #hexagonal #symmetry #the earth story

unearthedgemstones:Closeup of a ruby gemstone - The birthdays of July ❤️ More on ➡️ unearthedgemsto

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centergeoed:‪#‎FactFriday‬ Did you know that ‪#‎rubies‬ and ‪#‎sapphires‬ are actually the same mine

Link #geology #mineral #factfriday #sapphire #corundum #color #science #the earth story

Emeralds and oxygen: Back to the source.Finding out where emeralds come from is a tricky business. L

Link #mineral #emerald #crystal #geology #gemstone #dealer #isotope #chemistry #laboratory #the earth story #corundum

Ruby SlabI was telling my undergrad class today that the term “peraluminous” when applied to igneous

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Largest sapphire in the worldThe recently-reported “Star of Adam”sapphire was found in Sri Lanka and

Link #sapphire #mineral #crystal #sri lanka #nature #gemstone #corundum #mineralogy #metamorphic #star sapphire #star of adam #ratnapura #the earth story #science #geology

An unusual bit of optical ‘magic’…The interaction of metal atoms in the crystal s

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Inclusions in gemstones: bird flying through a cloud.The beautiful gems set in our jewellery have eq

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Zawadi sapphireA recently found (2010) opaque variety of Corundum displays a beautiful golden bronze

Link #sapphire #mineral #crystal #science #geology #corundum #swahili #kenya #somalia #the earth story #gemstone

Rough star sapphire (or is it ruby?)Both sapphire and ruby are the same mineral, corundum, a mixture

Link #science #geology #mineral #sapphire #mineralogy #chemistry #crystal #chromium #corundum #aluminum #the earth story

Sheared rubyA rather nice little crystal of red corundum from the Mogok stone tract of Burma testifi

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The corundum groupAntidotes to poisons, sources of spiritual energy, amulets protecting against sadn

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The corundum groupAntidotes to poisons, sources of spiritual energy, amulets protecting against sadn

Link #mineral #crystal #corundum #aluminum #oxide #oxygen #science #mineralogy #burma #sapphire #austria #crown #jewel #alaric #visigoth #the earth story