Rhodochrocite, Natrolite

This notable specimen is an impressive example featuring numerous red-brown rhodochrosite rosettes set within a creamy white aggregate of natrolite prisms. One particularly well-formed rhodochrosite crystal near the centre stands out for its form and striking presence. Collected by Peter Tarassoff in 1981, it originates from the De-Mix Quarry at Mont Saint-Hilaire, Québec. The rhodochrosite displays a deep red to reddish-brown hue with a velvety sheen—an uncommon and highly sought-after variation of the species. The crystals are arranged in semi-rosette clusters, lending the piece a delicate, sculptural aesthetic. Rhodochrosite from Mont Saint-Hilaire is distinctive on a global scale, and this specimen serves as a classic and highly representative example of the locality’s exceptional mineralogy.

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.