igneous
Pegmatite fragment
Granitic pegmatite, composed mainly of quartz, feldspar, and mica
AI-generated identification · may be incorrectCoarse, irregularly intergrown crystals with pale pink, cream, and translucent grains; quartz is Mohs 7, feldspar 6, and mica about 2–3. The image does not resolve individual crystals well enough to confirm the minerals or texture definitively.
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Physical properties
Coarse, irregularly intergrown crystals with pale pink, cream, and translucent grains; quartz is Mohs 7, feldspar 6, and mica about 2–3. The image does not resolve individual crystals well enough to confirm the minerals or texture definitively.
Formation & geological history
Pegmatite crystallizes from water-rich, silica-rich residual magma, commonly in veins near granite intrusions; its age depends on the local geology.
Uses & applications
Pegmatite is mined for feldspar, quartz, mica, and sometimes lithium, rare metals, or gem minerals; attractive pieces are collected or used decoratively.
Geological facts
Pegmatites can contain exceptionally large crystals and economically important minerals such as spodumene and tourmaline.
Field identification & locations
The specimen’s mixed light-colored, sparkly appearance is consistent with pegmatite, but a close-up or hardness tests would be needed for confident identification. Pegmatites occur worldwide, often around granitic rocks.
