staurolite: meaning, definition, pronunciation and examples
Low (Technical/Scientific)Technical/Formal
Quick answer
What does “staurolite” mean?
A brown, reddish-brown, or black mineral with a characteristic cross-shaped twin crystal formation, composed of iron, aluminum, and silicate.
Audio
Pronunciation
Definition
Meaning and Definition
A brown, reddish-brown, or black mineral with a characteristic cross-shaped twin crystal formation, composed of iron, aluminum, and silicate.
In geology and mineralogy, it is often referred to as 'fairy cross' or 'cross-stone' due to its distinctive twinned crystal habit forming natural crosses. It is also a common indicator mineral in medium-grade metamorphic rocks.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. The mineralogical nomenclature is standardised internationally. Spelling is identical.
Connotations
In regions where it is found (e.g., Georgia, USA; Scotland, UK), it may have local cultural connotations as a 'lucky' or novelty stone.
Frequency
Equally low frequency in both dialects, confined to geological contexts. Possibly slightly more frequent in American English due to notable deposits in the southeastern US and associated folk culture.
Grammar
How to Use “staurolite” in a Sentence
[Staurolite] + [verb: occurs/forms/is found] + [prep. phrase: in schist/as twins][Adjective: Twinned/Prismatic] + [staurolite][Verb: Contain/Include/Exhibit] + [staurolite]Vocabulary
Collocations
Examples
Examples of “staurolite” in a Sentence
adjective
British English
- The staurolite-bearing schist was clearly visible.
- A staurolite-rich layer defined the metamorphic grade.
American English
- The staurolite-bearing schist was clearly visible.
- A staurolite-rich layer defined the metamorphic grade.
Usage
Meaning in Context
Business
Rare. Possibly in the context of gemstone or mineral trade: 'The lot included several fine staurolite specimens.'
Academic
Primary context. Used in geology, earth science, and mineralogy papers and textbooks: 'The staurolite zone marks a specific pressure-temperature condition.'
Everyday
Very rare. Might be mentioned in tourist contexts near deposits or by hobbyist rock collectors.
Technical
The standard context. Precise mineralogical descriptions and metamorphic petrology: 'The pelitic schist is characterised by garnet and staurolite.'
Vocabulary
Synonyms of “staurolite”
Neutral
Weak
Watch out
Common Mistakes When Using “staurolite”
- Misspelling: 'staurolithe', 'staurolit'.
- Mispronunciation: placing stress on the wrong syllable (e.g., /stɔːˈrɒlɪt/).
- Using it as a general term for any cross-shaped object.
FAQ
Frequently Asked Questions
It is often called 'fairy cross' or 'cross-stone' due to the characteristic cross shape of its twinned crystals.
Staurolite is found in medium-grade metamorphic rocks such as schist and gneiss. Notable locations include the southeastern United States, the Alps, and Scotland.
No, it is not typically considered a gemstone due to its opacity and lack of brilliance. Its value is mainly scientific or as a collector's mineral and folk charm.
It acts as an index mineral, indicating specific pressure and temperature conditions (medium-grade metamorphism) during the rock's formation.
A brown, reddish-brown, or black mineral with a characteristic cross-shaped twin crystal formation, composed of iron, aluminum, and silicate.
Staurolite is usually technical/formal in register.
Staurolite: in British English it is pronounced /ˈstɔːrəlaɪt/, and in American English it is pronounced /ˈstɔrəˌlaɪt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: 'STAURO' sounds like 'store a' cross (staurolite crystals are often cross-shaped).
Conceptual Metaphor
CROSS (due to its shape) → Symbol of faith, luck, or intersection.
Practice
Quiz
In which field is the term 'staurolite' primarily used?