prase
Definition
- Noun (Mineralogy):
- A translucent variety of quartz: "Prase" is a type of quartz that is green in colour, typically due to inclusions of amphibole minerals or other green-coloured impurities.
- A specific gemstone: In gemology, "prase" refers to a green, translucent to semi-opaque chalcedony (a form of quartz) used as a semi-precious stone.
Usage Examples
- Noun:
- The jeweller set the ring with a polished prase, giving it a soft green glow. (A green quartz gemstone used in jewellery.)
- Mineral collectors value prase for its distinctive green colour, which is rarer than common quartz. (A specific type of green quartz.)
Advanced Usage
"prase opal": a rare green variety of opal, sometimes confused with prase quartz.
- The specimen was labelled as prase opal, but testing confirmed it was actually prase. (A distinction between two similar green minerals.)
"to cut prase": in lapidary (gem-cutting) work, to shape and polish this stone.
- The artisan carefully cut the prase to enhance its natural colour without losing material. (The process of working with this gemstone.)
Variants and Related Words
Prasine (adj): of a green colour, especially a pale green resembling that of leeks.
- The leaves of the plant were a prasine shade, reminiscent of the gemstone prase. (Describing a green hue.)
Prasolite (n): a rare mineral, a variety of cordierite that is green in colour.
- Prasolite is sometimes confused with prase due to their similar colour, but they have different chemical compositions. (A related green mineral.)
Synonyms
- Green quartz: a general term for any quartz that is green, including prase.
- Chrysoprase: a similar green gemstone, but it is a variety of chalcedony (like prase) that is typically brighter green and more translucent.
- Green chalcedony: a broader category that includes both prase and chrysoprase.
Related Idioms
- , as it is a technical term used primarily in mineralogy and gemology.