Blue with white seams
Sodalite
A blue to variable-colored feldspathoid mineral.
Sodalite is a sodium-rich feldspathoid, Na8Al6Si6O24Cl2.
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Tumbles and collector minerals
Compare familiar polished stones and collector minerals, including materials whose shop names cover mixtures or multiple species. Read the mineral descriptions alongside their histories and attributed modern traditions.
14 specimens · Geology, history, and attributed traditions
Blue rock gold grains
Lapis Lazuli
A rock containing blue lazurite with variable calcite, pyrite and other minerals.
Lapis lazuli is a rock rather than one blue mineral species.
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A pale vein map
Howlite
Calcium borosilicate hydroxide, commonly white with dark veining.
Howlite is calcium borosilicate hydroxide, Ca2B5SiO9(OH)5.
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Chalk white forms
Magnesite
Magnesium carbonate (MgCO3).
Magnesite is magnesium carbonate, MgCO3.
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Pink crossed by black
Rhodonite
Manganese-rich silicate material, often pink with dark manganese oxides.
Rhodonite is a manganese-rich silicate.
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Rose colored bands
Rhodochrosite
Manganese carbonate (MnCO3).
Rhodochrosite is manganese carbonate, MnCO3.
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Lavender mica pages
Lepidolite
Field/trade name for lithium-rich micas, not one accepted mineral species.
Lepidolite is a field and trade name for lithium-rich micas, not one fixed mineral species.
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Green mica light
Fuchsite
Chromium-bearing green muscovite variety.
Fuchsite is chromium-bearing green muscovite.
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Blue fibers in stone
Dumortierite
Aluminium borosilicate, commonly encountered in quartz-rich material.
Dumortierite is an aluminium borosilicate.
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Violet silk currents
Charoite
Complex silicate mineral usually sold as purple charoite-bearing rock.
Charoite is a complex silicate mineral, commonly presented as a purple charoite-bearing ornamental rock.
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Dense violet mosaic
Sugilite
A complex potassium-sodium lithium silicate mineral, often sold in mixed massive material.
Sugilite is a complex silicate containing potassium, sodium and lithium among other elements.
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Blue copper mixtures
Shattuckite
A copper silicate hydroxide mineral, often present in blue-green mixed rocks.
Shattuckite is a copper silicate hydroxide, commonly appearing as blue aggregates rather than large solitary prisms.
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Small emerald green prisms
Dioptase
Hydrated copper silicate, often emerald green.
Dioptase is a hydrated copper silicate, CuSiO3·H2O.
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Blue rounded surfaces
Hemimorphite
Hydrated zinc silicate.
Hemimorphite is a hydrated zinc silicate, Zn4Si2O7(OH)2·H2O.
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