| short for minerals of the columbite group• , a rock composed of feldspar, epidote and quartz• green gem variety of beryl | a group of closely-related minerals in the zeolite group• group name - asbestiform serpentine• Varieties that are not valid species:• red gem variety of beryl C Native• Varieties that are not valid species:• Varieties that are not valid species:• Varieties that are not valid species:• a brown or black variety of quartz• synonym of smoky quartz N• Iron oxide cemented soil or sediment G• Varieties that are not valid species:• Varieties that are not valid species:• a group of silicate minerals• a monochromatic banded variety of chalcedony• Varieties that are not valid species:• variety of calcite M Muscovite• Varieties that are not valid species:• tough, green mineral either jadeite or amphibole• metamorphic rock - zoisite, ruby, and hornblende• Varieties that are not valid species:• gem variety of grossularite garnet U• a group of silicate minerals• fibrous serpentine- or amphibole minerals• a massive impure form of uraninite• gem corundum of any color except red, especially blue varieties• Varieties that are not valid species:• light blue variety of beryl• Varieties that are not valid species:• a variety of amber T Massive in matrix with quartz from , |
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| Varieties that are not valid species:• Varieties that are not valid species:• a group of silicate minerals• Varieties that are not valid species:• Varieties that are not valid species:• | Varieties that are not valid species:• Varieties that are not valid species:• variety of chrysoberyl D The slightly misshapen octahedral shape of this rough crystal in matrix is typical of the mineral |
A chromian variety of Illite.
26.