cymophane
Very LowTechnical, Formal
Definition
Meaning
A variety of chrysoberyl exhibiting a distinctive chatoyant or wavy luminous band when cut en cabochon.
A rare and valued gemstone known for its 'cat's eye' effect; historically prized by collectors and in jewellery for its optical phenomenon.
Linguistics
Semantic Notes
The term is almost exclusively used within gemology and historical or high-end jewellery contexts. It is a hyponym of 'chrysoberyl'.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or spelling.
Connotations
Equally specialised and rare in both varieties.
Frequency
Extremely rare in everyday speech in both regions, confined to specialist fields.
Vocabulary
Collocations
Grammar
Valency Patterns
The cymophane (subject) exhibits a chatoyant band.The jeweller mounted the cymophane (object).Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “None”
Usage
Context Usage
Business
Used in high-value gemstone trade catalogues.
Academic
Used in mineralogy and gemology textbooks and papers.
Everyday
Virtually never used.
Technical
Precise term in gem identification and description.
Examples
By Part of Speech
adjective
British English
- The cymophane cabochon was the centrepiece.
American English
- The cymophane gemstone displayed a sharp eye.
Examples
By CEFR Level
- The collector was thrilled to acquire a piece of cymophane.
- Cymophane, distinguished by its remarkable chatoyancy, is significantly rarer than common quartz cat's eyes.
Learning
Memory Aids
Mnemonic
Think 'SIGH-mo-fane' – the stone that makes you sigh with its wavy, fan-like light.
Conceptual Metaphor
A FROZEN BEAM OF LIGHT (describing its linear chatoyancy).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid confusing with general 'кошачий глаз' (cat's eye), which can refer to other materials like quartz. 'Cимовол' is not a standard term; use technical description 'кошачий глаз-хризоберилл'.
Common Mistakes
- Misspelling as 'cymophone' or 'symophane'.
- Using it as a general term for any cat's eye gemstone.
Practice
Quiz
Cymophane is a specific variety of which mineral?
FAQ
Frequently Asked Questions
Cymophane is a specific type of 'cat's eye' gemstone, but the term 'cat's eye' alone can refer to other minerals like quartz. True cymophane is always chrysoberyl.
The effect, called chatoyancy, is caused by parallel inclusions of fine, needle-like rutile crystals within the stone, reflecting light in a narrow band.
High-quality cymophane with a sharp, centred eye and good colour is very valuable, often commanding higher prices than many other gemstones.
Notable sources have included Sri Lanka, India, Brazil, and Madagascar, often found in alluvial deposits.