Pectolite

The now-closed Jeffrey Mine in Québec is renowned for producing some of the finest grossular garnets, vesuvianite, and pectolite crystals ever found. This miniature specimen features sharp, white to colourless pectolite blades, well-formed and in a matrix made up of pectolite—a notable example for a mineral more commonly seen in thin, acicular crystals. Pectolite from this locality is relatively uncommon in such robust, distinct form, making this a fine and desirable specimen.

Once one of the world's largest chrysotile asbestos operations, the Jeffrey Mine in Val-des-Sources (formerly Asbestos), Québec, spanned 2 kilometres in diameter and reached depths of 350 metres. Mining began in 1879, and by 1969 the open-pit expansion forced the relocation of the town itself. The mine ultimately closed in 2001 due to the global decline in asbestos demand following its classification as a carcinogen. Since then, the locality has remained inactive, making specimens like this increasingly rare and highly collectible.