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granular or columnar
a ruby stone is considered the glorious of all the gemstones
faceted proustite can display deep red colours with a beautiful and distinctive metallic surface lustre
In 1975 the citizens of Ontario chose to make Thunder Bay Amethyst their official gemstone
Alpes-Cote D'Azur
Romanechite From Spain- Collectors Piece bookend granular or columnarRomanechite From Spain Collectors Piece (Stand Included) Weight 120g Size 6. 5cm by 5cm Thickness 4cm Romanechite, barium and manganese oxide [(Ba, H2O)2(Mn4+, Mn3+)5O10], an important ore mineral of manganese. A secondary mineral formed under surface conditions, it is often a dark gray to black alteration product of manganous carbonate or silicate minerals. It may form large residual deposits and occurs abundantly in lake or swamp bedded deposits and