Granodiorite
Rock
About it
Looks like a greyer granite: more white plagioclase than pink potassium feldspar, plus quartz and more black biotite and hornblende. Makes up much of the Sierra Nevada and Coast Mountains batholiths.
- Type
- Rock (igneous)
- Group
- Igneous (plutonic)
- Specific gravity
- 2.65–2.8
- Colours
- light grey, white, speckled with black
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.