Pegmatitic granite specimen

Coarse, irregular intergrowth of pale pink-white feldspar and translucent gray quartz, with dark mica or other inclusions; minerals have Mohs hardness about 2–7, depending on phase. Luster ranges from vitreous to pearly; crystal structure is visible in individual mineral grains, though the specimen’s exact minerals cannot be confirmed from the image alone.

Formed as a late, volatile-rich melt crystallized slowly in a granitic intrusion, producing unusually coarse crystals. Pegmatites occur across many geological ages and commonly form in continental crust.

Pegmatites are sources of feldspar, quartz, and mica, and may host lithium, tantalum, or other rare elements; attractive crystals are collected as mineral specimens.

The exceptionally coarse texture is characteristic of pegmatite, although this sample’s grain size and composition are difficult to assess from the photograph.

Look for coarse, interlocking quartz and feldspar, often with mica; common in granitic terrains worldwide. A laboratory or hand-sample inspection would be needed to identify its minerals precisely.