![8.2 Hornblende syenite. West Texas. Alkali feldspars are white to gray to light-orange, but are stained darker orange in some places. Gray grains include some plagioclase. Hornblende forms radiating clusters and individual rectangular to wedge-shaped grains. Tiny magnetite or ilmenite grains make black spots surrounded by oxidation rings. Pink, red, orange, and yellow mineral coatings of hematite and limonite (?) surround hornblendes and other iron-bearing grains. [Standard cm scale provided.]](../8.2.JPG)
8.2 Hornblende syenite. West Texas. Alkali feldspars are white to gray to light-orange, but are stained darker orange in some places. Gray grains include some plagioclase. Hornblende forms radiating clusters and individual rectangular to wedge-shaped grains. Tiny magnetite or ilmenite grains make black spots surrounded by oxidation rings. Pink, red, orange, and yellow mineral coatings of hematite and limonite (?) surround hornblendes and other iron-bearing grains. [Standard cm scale provided.]