Nepheline syenite
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Nepheline syenite is a holocrystalline plutonic rock that consists largely of nepheline and alkali feldspar. The rocks are mostly pale colored, grey or pink, and in general appearance they are not unl
Hand samples of nepheline syenite of the Ordovician Beemerville Complex, northern New Jersey
Nepheline syenite of the Intrusive Complex of Tanguá, State of Rio de Janeiro, Brazil (Motoki et al., 2011a)
Kakortokite (eudialytic nepheline syenite) Kangerdluarssaq Fjord, far-southern Greenland. Slab is 9.5 cm tall.
Pseudoleucite nepheline syenite of the Intrusive Complex of Morro de São João, State of Rio de Janeiro, Brazil (Motoki et al., 2011b)
Pegmatite
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A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm and sometimes greater than 1 meter. Most pegmatites are composed of qua
Pegmatite with blue corundum crystals
Pegmatite containing lepidolite, tourmaline, and quartz from the White Elephant Mine in the Black Hills, South Dakota
Proterozoic pegmatite swarm in the headwall of the cirque of a small mountain glacier, northeastern Baffin Island, Nunavut
Rose muscovite from the Harding Pegmatite Mine