celestite

As nouns the difference between selenite and celestite

is that selenite is a soft, glassy form of gypsum (chemical formula CaSO₄·2H₂O) while celestite is a colourless, orange or blue mineral, strontium sulfate, SrSO₄, that is an ore of strontium and constitutes the skeletons of Acantharea.

As nouns the difference between celestite and angelite

is that celestite is a colourless, orange or blue mineral, strontium sulfate, SrSO₄, that is an ore of strontium and constitutes the skeletons of Acantharea while Angelite is a fan of the television series Angel.

As a noun celestite is

(mineral) a colourless, orange or blue mineral, strontium sulfate, sr]]s[[oxygen|o₄, that is an ore of strontium and constitutes the skeletons of acantharea.

As an initialism HTTPS

is hypertext Transfer Protocol Secure (HTTP Secure), an encrypted form of information transfer on the Internet.

As a noun celestite is

a colourless, orange or blue mineral, strontium sulfate, SrSO₄, that is an ore of strontium and constitutes the skeletons of Acantharea.