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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 (0.4 in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are…
Economy & Art
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pegmatites crystals quartz rock feldspar composition elements found minerals form spodumene beryl large igneous granite microcline metamorphic size body fluid
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Pegmatite | is a | igneous rock showing a very coarse texture | 0.90 | text |
| Pegmatite | is a | pegmatite with the composition of granite while nepheline syenite pegmatite is a pegmatite with the composition of nepheline syenite | 0.90 | text |
| Pegmatite | related to Classification | Modern | 0.60 | section |
| Pegmatite | related to Classification | Buddington | 0.60 | section |
| Pegmatite | related to Classification | Ginsburg | 0.60 | section |
| Pegmatite | related to Classification | Rodionov | 0.60 | section |
| Pegmatite | related to Classification | Cerny’s | 0.60 | section |
| Pegmatite | related to Classification | Granitic | 0.60 | section |
| Pegmatite | related to Classification | Cerny | 0.60 | section |
| Pegmatite | related to Classification | Classes | 0.60 | section |
| Pegmatite | related to Classification | Abyssal | 0.60 | section |
| Pegmatite | related to Classification | Muscovite | 0.60 | section |
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