Spar

Name:
Spar
Detailed information:
(1) A type of crystalline material such as Iceland spar or feldspar, usually containing calcium carbonate or an aluminum silicate; fluorspar is calcium fluoride. Iceland spar has unique optical properties. (2) A weather-resistant varnish originally used for coating wooden spars of sailing ships, which may be the reason for its name.See Spar Varnish.