Eudialyte
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Eudialyte, whose name derives from the Greek phrase Εὖ διάλυτος, eu dialytos, meaning "well decomposable", is a somewhat rare, nine-member-ring cyclosilicate mineral, which forms in alkaline igneous r
Eudialyte 163974
Pink eudialyte in syenite (lujavrite) from Poços de Caldas, Brazil. The white mineral is alkali feldspar, the black is aegirine, and the little brown bits are biotite.
Nepheline
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Nepheline, also called nephelite, is a rock-forming mineral in the feldspathoid group – a silica-undersaturated aluminosilicate that occurs in intrusive and volcanic rocks with low silica, and in thei
Eudialyte
…eu dialytos, meaning "well decomposable", is a somewhat rare, nine-member-ring cyclosilicate mineral, which forms in alkaline igneous rocks, such as nepheline syenites. Its name alludes to its ready solubility in acid. Eudialyte was first described in 1819 for an occurrence in nepheline syenite of the Ilimaussaq…
Nepheline 3
Grayish-white nepheline crystals with dark schorlomite from Bou-Agrao Mount, Tamazeght complex, High Atlas Mountains, Morocco. Size: 6.0 cm × 4.4 cm × 3.8 cm (2.4 in × 1.7 in × 1.5 in)