Definition
Origin
Discoverer
Etymology
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Other Categories
Mugearite is a type of oligoclase bearing basalt, also comprising of olivine, apatite, and opaque oxides
Durable Rock, Medium Hardness Rock
Ijolite is an intrusive igneous rock which is composed mainly of nepheline and an alkali pyroxene, usually aegirine-augite
From the first syllable of the Finnish words Ii-vaara, Iijoki, &c. commonly used geographical names in Finland, and the Gr. Xiflos, a stone
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock