Definition
calcspar
noun
- A transparent or translucent crystalline mineral form of calcium carbonate, used in optical instruments and as a gemstone.
Usage: Also called Iceland spar or Iceland crystal.; Mineralogy term.
Examples
- Calcspar crystals were historically used in polarizing lenses for optical devices.
- The geologist identified the specimen as high-quality calcspar based on its birefringence.
- Iceland spar, another name for calcspar, was prized by early scientists studying light refraction.
- Calcspar deposits are found in volcanic and sedimentary rock formations worldwide.