ˈseləˌstīt, sə̇ˈleˌ- noun
( -s )
Etymology: German zölestin (from Latin caelestis celestial + German -in -ine) + English -ite; from its blue color
: a mineral SrSO 4 consisting of native strontium sulfate commonly white and occasionally of a delicate blue color and occurring in orthorhombic crystals and in compact massive and fibrous forms