Thursday, August 9, 2012

Gemstone of the Week: Despujolsite

(Despujolsite image from

Despujolsite is an extremely rare manganese sulfate gemstone.  Until just recently (thanks to the glory that is Pinterest!) I hadn't even heard of it, and I'm sure most others haven't either. It is named in honour of Pierre Despujols who was the founder of the Moroccan Geologic Survey. Small crystals of Despujolsite were initially sold as "Green Ettringite" and it is due to the Robert Downs lab at the University of Arizona that the crystal form of this gemstone has been recognized as being another form Despujolsite.  Despujolsite was first discovered in Morocco in 1968.