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Metals including stalactitic lepidocrocite, hematite, limonites, etc.. Chromolithograph from Dr. Adolph Kenngotts Mineralogy section in Gotthilf Heinrich von Schuberts Natural History, Schreiber
Variety of GemstonesLeft to right, top: Onyx, cornelian, tigers eye, jet, turquoise, lapis lazuli, hematite, jade. Bottom: Ivory, amber, coral, cultured pearl, freshwater pearl, shell, cameo
Rubies and sapphiresCrystals of ruby from Burma which is the red variety of corundum (aluminium oxide). The other variety is sapphire, this specimen is from Kashmir. The lower left specimen is the Edwardes Ruby
Ruby and sapphire gravelRuby and sapphire fragments from gem gravels seen on a background of slate. Ruby and sapphire are both varieties of the mineral corundum (aluminium oxide)
Hematite tumblestone
Hematite groupA group of hematite
Star rubies and sapphiresStar stones of ruby and sapphire, both are varieties of the mineral corundum (aluminium oxide). Ruby always appears in red where as sapphire comes in a variety of colours
Ruby and Sapphire cut stones
HematiteIridescent crystalline mass of hematite (iron oxide) from Rio Marina, Elba. Specimen from the collections of the Natural History Museum, London
Baryte crystalsYellow prisms of the minreal baryte (BaSO4) on hematite (iron oxide) from Dalmellington Mine, Frizington, Cumbria