1. A mineral consisting of strontium sulfate, typically occurring in colorless or pale blue crystals and used as a source of strontium compounds.
Usage: Also called celestine.; Technical/mineralogical term.

Examples

• Celestite deposits are found in sedimentary rock formations around the world.
• The pale blue celestite crystals in the museum specimen were remarkably transparent.
• Strontium extracted from celestite is used in fireworks to produce red colors.
• Geologists identified celestite as the primary mineral in the cave's crystal formations.
• The chemical formula of celestite is SrSO₄.