3 Bilder zum Thema "al2o3" bei ClipDealer

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Raw ruby gemstone on rough white matrix, also called Red Corundum, very hard precious gem. Birthstone for July.
Aluminium hydroxide powder Al(OH)3, is found in nature as the mineral gibbsite, also known as hydrargillite.
Photo of a Padparadsha colored Corundum gemstone, cut in the shape of a Spinner, placed on a surface of black silicon carbide

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