hornblende

/'hɔ:nblend/

Thân thiện

A geologist examines a dark green hornblende crystal in a rock sample.

Definition

1. Noun:
   • A green to black mineral of the amphibole group: Hornblende is a common rock-forming mineral composed primarily of silicates of calcium, sodium, magnesium, and iron. It is typically found in igneous and metamorphic rocks.

Usage Examples

• Noun:
  • The granite sample contained large, dark crystals of hornblende.
  • Geologists identified the black, shiny mineral in the schist as hornblende.

Advanced Usage

• "Hornblende schist": A type of metamorphic rock rich in hornblende.
  • The region is known for its outcrops of hornblende schist.

Variants and Related Words

• Amphibole (n): The mineral group to which hornblende belongs.
  • Hornblende is the most common member of the amphibole group.

Synonyms

• Amphibole mineral: A more general term for minerals in the same group.

Học thuật

Noun

1. a green to black mineral of the amphibole group; consists of silicates of calcium and sodium and magnesium and iron