Shortite, Calcite, Pectolite

This miniature specimen features a rich patch of mostly massive, translucent yellow shortite in matrix along with colourless calcite and pectolite. A small vug is visible lined with a druse of micro pectolite crystals. Shortite is a rare sodium-calcium carbonate mineral, and this piece represents not only a true rarity but also a rich and displayable example of the species. Although shortite was not first discovered at Mont Saint-Hilaire, specimens from this locality are considered among the finest known, valued for their clarity and well-documented paragenetic context. While it may lack the vibrantcy of other Mont Saint-Hilaire minerals, shortite’s rarity makes it a highly sought-after species for systematic collectors. Collected by Peter Tarassoff in 1991.

Mont Saint-Hilaire is considered one of the most mineralogically diverse localities in the world, having produced hundreds of rare and unique mineral species—including many of the finest best-of-species specimens ever found. Once accessible to collectors, the quarry is now under strict control, with field collecting entirely prohibited. As a result, specimens like this one have become increasingly scarce and sought after by collectors.

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This specimen comes from the collection of Dr. Peter Tarassoff, a prominent figure in mineralogy, particularly known for his work at Mont Saint-Hilaire (MSH). His diligent collecting and examination efforts have led him to be the first to identify at least 35 species and discover 12 new species, not only at MSH but also at other alkaline localities. Dubbed the "Dean" of Mont Saint-Hilaire collectors, Peter was honoured with the naming of the new species petarasite in 1980. He has authored or co-authored numerous mineralogical articles and has been a member of the Mineralogical Association of Canada since 1964. Additionally, Peter has volunteered at the Redpath Museum for the past 21 years, where he was formally appointed the Honorary Curator of Mineralogy. In recognition of his significant contributions to mineralogy, Peter was awarded the 2017 Pinch Medal.