Properties & Information
Alurgite
AlurgiteSCIENCE / MINERALOGYAlurgite is an old varietal name used for manganese-bearing muscovite mica, typically showing reddish purple, rose, brown-red, or violet colors. It is not a separate modern IMA mineral...
Alurgite
AlurgiteSCIENCE / MINERALOGYAlurgite is an old varietal name used for manganese-bearing muscovite mica, typically showing reddish purple, rose, brown-red, or violet colors. It is not a separate modern IMA mineral...
Alien Amethyst
Alien AmethystSCIENCE / MINERALOGYAlien Amethyst is a recent trade name for Indian amethyst specimens showing multiple generations of quartz growth with iron-rich hematite coatings or inclusions. Mineralogically, the material is...
Alien Amethyst
Alien AmethystSCIENCE / MINERALOGYAlien Amethyst is a recent trade name for Indian amethyst specimens showing multiple generations of quartz growth with iron-rich hematite coatings or inclusions. Mineralogically, the material is...
Alexandrite
AlexandriteSCIENCE / MINERALOGYAlexandrite is the color-change variety of chrysoberyl, BeAl₂O₄. Chromium substituting into the crystal structure produces its famous color change: typically green to bluish green in daylight and red,...
Alexandrite
AlexandriteSCIENCE / MINERALOGYAlexandrite is the color-change variety of chrysoberyl, BeAl₂O₄. Chromium substituting into the crystal structure produces its famous color change: typically green to bluish green in daylight and red,...
Agni Manitite (Pearl of the Divine Fire)
Agni Manitite (Pearl of the Divine Fire)SCIENCE / MINERALOGYAgni Manitite is a modern trade name applied to dark, weathered glassy stones from Indonesia. Laboratory work reported on marketed material has...
Agni Manitite (Pearl of the Divine Fire)
Agni Manitite (Pearl of the Divine Fire)SCIENCE / MINERALOGYAgni Manitite is a modern trade name applied to dark, weathered glassy stones from Indonesia. Laboratory work reported on marketed material has...
Afghanite
AfghaniteSCIENCE / MINERALOGYAfghanite is a rare feldspathoid mineral of the cancrinite group, typically blue to colorless, with a complex sodium-calcium-potassium aluminosilicate sulfate-chloride composition. It crystallizes in the trigonal system and...
Afghanite
AfghaniteSCIENCE / MINERALOGYAfghanite is a rare feldspathoid mineral of the cancrinite group, typically blue to colorless, with a complex sodium-calcium-potassium aluminosilicate sulfate-chloride composition. It crystallizes in the trigonal system and...
Aegirine
AegirineSCIENCE / MINERALOGYAegirine is a sodium iron pyroxene with the formula NaFe³⁺Si₂O₆. It crystallizes in the monoclinic system and typically forms elongated prismatic crystals in dark green, green-black, brown, or...
Aegirine
AegirineSCIENCE / MINERALOGYAegirine is a sodium iron pyroxene with the formula NaFe³⁺Si₂O₆. It crystallizes in the monoclinic system and typically forms elongated prismatic crystals in dark green, green-black, brown, or...