Pegmatite
Rock
Also called Graphic granite (intergrown texture)
About it
Very coarse rock, usually granitic, with crystals from centimetres to metres long, grown from the last water-rich melt. Source of many collector minerals: tourmaline, beryl, topaz, spodumene, mica books, and rare-element species.
- Type
- Rock (igneous)
- Group
- Igneous (plutonic)
- Colours
- white, pink, grey, speckled with black
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.