Celestine also known as celestite is relatively soft so must be handled carefully. Although best known for its blue crystals they also occur in several other colours including white and colourless. The mineral celestine can also occur in massive form meaning crystals grow as one large mass with no external visible shape.
This rough celestine mineral which boasts large well formed translucent crystals makes an eye-catching display piece. The colour of celestine may not always be stable and can fade to colourless in direct sunlight. For this reason it should not be placed on (or close to) a sunny window sill.
The names celestine and celestite come from the Latin word 'caelestis' meaning 'of (or) in the heavens' which metaphorically can also mean 'divine' or 'god-like'. Both names stem from the mineral's heavenly blue colour.
Interestingly celestine is the main source of the chemical element strontium which is widely used in fireworks and alloys. Strontium is a soft silvery white yellowish metal.