staurolite

[ stawr-uh-lahyt ]

noun

1. a mineral, basic iron aluminum silicate, Fe 2 Al 2 O 7 (SiO 4 ) 4 (OH), occurring in brown to black prismatic crystals, which are often twinned in the form of a cross.

staurolite

/ ˈstɔːrəˌlaɪt; ˌstɔːrəˈlɪtɪk /

noun

1. a brown glassy mineral consisting of iron aluminium silicate in the form of prismatic crystals: used as a gemstone. Formula: Fe 2 Al 9 Si 4 O 11 (OH) 2

staurolite

/ stou′rə-līt′ /

1. A brownish to black orthorhombic mineral, often having crossed intergrown crystals and found in mica schists and gneisses. Chemical formula: (FeMg) 2 Al 9 Si 4 O 23 (OH) .

Derived Forms

• staurolitic, adjective

Other Words From

• stau·ro·lit·ic [stawr-, uh, -, lit, -ik], adjective

Word History and Origins

Origin of staurolite¹

1790–1800; < Greek stauró ( s ) a cross + -lite

Word History and Origins

Origin of staurolite¹

C19: from Greek stauros a cross + -lite

Example Sentences

Kyanite and staurolite may also be mentioned as occasionally occurring.

From Project Gutenberg