pegmatite gabbro
Classification
Basal igneous rock
color
White + Dark Green/Black
fabric
Pegmatite - massive crystals
mineral composition
Plagioclase + pyroxene + hornblende
Chemical composition
Silica content 45-52%, classified as basic rock
Formation environment
The cooling environment is very slow with a high concentration of residual elements and occurs in the marginal part of large magma chambers or in open fissures that allow large crystal growth.
structure
The structure is sometimes randomly arranged or radially arranged.
Uses
1- Some types are used in the manufacture of decorative stones.
2- It is used for educational and geological purposes.
Geographical presence
Arabian Shield rocks, Saudi Arabia
