black diamond
- noun
- /blæk ˈdaɪmənd/
- Specialized
:
diamante negro industrial
- A black diamond is often used in industrial applications.
Examples
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Did you know that black diamonds are not suitable for jewelry?
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The company imports black diamonds for use in their drilling equipment.
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Although not suitable for jewelry, black diamond fragments are highly valued in industry.
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Only black diamonds were hard enough to cut through the tough rock.
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In construction, workers often rely on black diamond tools for drilling through tough materials.
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The black diamond is essential in the manufacturing of abrasives used to polish various surfaces.
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Despite their dark appearance, black diamonds are favored in industry for their durability in cutting and grinding.
Synonyms
1
9.9
A dark, hard diamond that people use to make drill bits and tools
1
9.9
Small rough diamond pieces used in tools for cutting or drilling hard materials
How Valuable
47
1.3
- Specialized
Surface Forms
Morphology
The meaning 'a diamond that is black in color' is directly and transparently composed from 'black' (colour) + 'diamond' (gem), following a straightforward adjective + noun pattern. Even if the gemstone is rare, the semantic combination is predictable and cross-linguistically common, so a B1 learner who knows the parts will understand it.
Etymology
Black diamond comes from the dark stones miners put on saws and drill bits; imagine a tool with rough, black edges cutting through rock. Because these dark black stones were used for tools rather than for 'jewelry', the name came to mean a diamond used for industrial work.