opaque gem
Noun: An opaque gem is a gemstone that does not allow light to pass through it. Unlike transparent or translucent stones, its internal features and the opposite side are not visible.
The term "opaque gem" is used to classify and describe gemstones based on their optical property of opacity. It is a descriptive category in gemology, jewelry, and mineralogy. * Turquoise and lapis lazuli are popular opaque gems used in jewelry. * The collector specialized in rare opaque gems rather than transparent diamonds.
- As a defining characteristic: The term is often used to explain why a particular gemstone is cut or valued in a certain way, as opaque gems are typically cut (with a smooth, rounded surface) to best display their color or surface patterns, rather than being faceted for brilliance.
- Because it is an opaque gem, the malachite was polished into a smooth cabochon to highlight its striking green bands.
- Opaque (adjective): Not able to be seen through; not transparent or translucent. This is the root adjective describing the gem's property.
- Gemstone (noun): A mineral, rock, or organic material that is cut and polished for use in jewelry. This is the broader category.
- Cabochon (noun): A gemstone that has been shaped and polished, typically with a flat back and a convex, rounded top, a common cut for opaque gems.
- Non-transparent gem
- Non-see-through gemstone
The term "opaque gem" has a very specific meaning within its domain. It does not have other common metaphorical meanings. However, the adjective "opaque" itself can be used figuratively to describe something that is hard to understand. * Literal (Gemology): The ring was set with a beautiful opaque gem. * Figurative (Adjective "opaque"): His explanation was completely opaque to me. (This figurative use applies to the adjective "opaque," not directly to the noun phrase "opaque gem").
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a gemstone that is opaque
