star ruby: meaning, definition, pronunciation and examples
C1Specialist / Technical
Quick answer
What does “star ruby” mean?
A variety of the gemstone ruby which exhibits a six-rayed star-like pattern (asterism) when cut as a cabochon.
Audio
Pronunciation
Definition
Meaning and Definition
A variety of the gemstone ruby which exhibits a six-rayed star-like pattern (asterism) when cut as a cabochon.
A valuable and visually distinct gem used in fine jewellery; can metaphorically refer to something rare, precious, or uniquely brilliant.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling of related words may follow regional conventions (e.g., jewellery/jewelery).
Connotations
Both associate it with high value and rarity. Potentially stronger association with royal/ceremonial jewellery in British contexts.
Frequency
Equally low frequency in both dialects, confined to gemmology and jewellery contexts.
Grammar
How to Use “star ruby” in a Sentence
[The] star ruby [was set in the ring]a [genuine] star ruby [from Burma]The [asterism in the] star ruby [was sharp]Vocabulary
Collocations
Examples
Examples of “star ruby” in a Sentence
verb
British English
- The gemstone is expertly cut to star ruby the cabochon.
American English
- The lapidary will star-ruby the stone for a pendant.
adjective
British English
- The star-ruby effect was breathtaking.
American English
- She admired the star-ruby necklace.
Usage
Meaning in Context
Business
In luxury goods and jewellery auctions: 'The estate sale features a notable star ruby necklace.'
Academic
In gemmology or mineralogy papers: 'The asterism in star ruby is caused by oriented rutile inclusions.'
Everyday
Descriptive or admiring: 'Her ring has a stunning red stone called a star ruby.'
Technical
Precise specification in gem certification: 'Cabochon-cut star ruby, 6-ray asterism, 3.2 carats.'
Vocabulary
Synonyms of “star ruby”
Strong
Neutral
Weak
Vocabulary
Antonyms of “star ruby”
Watch out
Common Mistakes When Using “star ruby”
- Misspelling as "star rubby".
- Using "star ruby" as a countable noun without an article (e.g., 'It is star ruby' instead of 'It is a star ruby').
- Pronouncing 'ruby' as /ˈrʌb.i/ instead of /ˈruː.bi/.
FAQ
Frequently Asked Questions
Not necessarily. Value depends on colour, clarity, size, and the sharpness and centering of the star. A fine star ruby can be extremely valuable.
By definition, a star ruby is red. A blue stone with asterism is a 'star sapphire.' Both are varieties of the mineral corundum.
Historically, Myanmar (Burma) and Sri Lanka are famous sources. They are also found in other regions including India, Africa, and Vietnam.
The star (asterism) is caused by microscopic, needle-like inclusions of the mineral rutile (titanium dioxide) aligned in three directions within the ruby, reflecting light.
A variety of the gemstone ruby which exhibits a six-rayed star-like pattern (asterism) when cut as a cabochon.
Star ruby is usually specialist / technical in register.
Star ruby: in British English it is pronounced /ˈstɑː ˈruː.bi/, and in American English it is pronounced /ˈstɑːr ˈruː.bi/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[Rare] as a star ruby.”
- “To have a star ruby moment (to shine uniquely).”
Learning
Memory Aids
Mnemonic
Imagine a ruby that contains a hidden star. When you polish it into a dome (cabochon), the star appears — a star RUBY.
Conceptual Metaphor
UNIQUE VALUE IS A STAR RUBY (e.g., 'Her contribution was the star ruby of the project').
Practice
Quiz
What optical phenomenon is a star ruby known for?