| 21. | Gabrielite is a sulfosalt mineral species occurring as idiomorphic crystals commonly found in cavities of a Triassic dolomitic rock.
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| 22. | Wolfe concluded that the material was anapaite partially altered to collinsite and he discredited messelite as a valid mineral species.
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| 23. | There are about 20 mineral species that qualify as gem minerals, which constitute about 35 of the most common gemstones.
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| 24. | Forming 12 % of the Earth's crust, quartz ( SiO 2 ) is the most abundant mineral species.
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| 25. | The goal is to promote the science of mineralogy and to standardize the nomenclature of the 4000 plus known mineral species.
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| 26. | In nature, cumulates usually form from 2 mineral species, although ranges from 1 to 4 mineral species are known.
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| 27. | In nature, cumulates usually form from 2 mineral species, although ranges from 1 to 4 mineral species are known.
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| 28. | A study published in 2011 presented evidence that barbertonite is a polytype of stichite and should be discredited as a mineral species.
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| 29. | In rocks, some mineral species and groups are much more abundant than others; these are termed the rock-forming minerals.
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| 30. | The now empty angular holes are interpreted as being cavities once filled by a highly soluble mineral species, most likely a magnesium sulfate.
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