Monzonite
Rock
Also called Quartz monzonite (quartz-richer variety)
About it
Coarse rock with roughly equal potassium feldspar and plagioclase, little quartz, and some dark minerals, between syenite and diorite. Named for Monzoni in the Italian Dolomites; quartz monzonite hosts many porphyry copper deposits.
- Type
- Rock (igneous)
- Group
- Igneous (plutonic)
- Specific gravity
- 2.65–2.9
- Colours
- grey, pink, pinkish grey, speckled with black
- Transparency
- opaque
Typical values: real specimens vary. For more, see mindat.org.