Beautiful celestine in a rich color

A Celestite from Madagascar with a particularly strong blue coloration.

Celestite is strontium sulfate (SrSO₄). The light to deep blue coloration is caused by traces of radiation defects in the crystal lattice, a rare color in the mineral kingdom.

The intensity of the color varies between individual pieces even within the same deposit; pieces with such distinct saturation are particularly sought after by collectors.

Celestite is soft with a Mohs hardness of 3-3.5 and should be protected from scratches. The coloration can fade with prolonged UV exposure.

A collector's item with a strong color presence.