Nepheline vs Eudialyte - What's the difference?
nepheline | eudialyte |
(mineralogy) A feldspathoid mineral of silica-poor igneous, plutonic and volcanic rocks. Chemically, nepheline is a plagioclase feldspar with insufficient silica to satisfy the chemical bonds. Because of the unfilled bonds, nepheline rapidly and can only be seen as inclusions in freshly broken rock.
(mineral) A red silicate mineral that forms in alkaline igneous rocks such as nepheline syenites.