New finds in 2016 at the Poudrette Quarry, Mont-Saint-Hilaire, Quebec Province, Canada

New finds in 2017 at the Poudrette Quarry, Mont-Saint-Hilaire, Quebec Province, Canada

Lately, the new mineral schizolite (NaCaMnSi3O8(OH)) was re-instated as a valid species. This new mineral of the serandite-pectolite series was previoulsy labelled marshallsussmanite from 2013 to 2018. The later name was dropped and replaced by schizolite.

The latest book about the history, geology and mineralogy of the Poudrette Quarry, Mont Saint-Hilaire, Quebec, Canada, has been published late 2019 by the Mineralogical Association of Canada as Special Publication #14 under The Canadian Mineralogist.

Dioptase: an emerald-green to blue-green gemmy mineral species The mineral species Dioptase is a trigonal cyclosilicate, CuSiO3 · H2O. Cyclosilicates belong to the larger class of silicate minerals.