This flat from the Gerd Tremmel collection contains a diverse selection of classic mineral specimens from Mount Saint Hilaire, Quebec—one of the most famous and mineralogically unique localities worldwide. The pieces date back to 1980 and display the typical contrasts of this alkaline intrusive complex: dark host rocks with light, glassy to granular mineral zones, embedded crystals, and characteristic parageneses of rare silicates. Several specimens feature visible crystals, mostly small but clearly defined, reflecting the complex cavity fillings within pegmatitic and syenitic rocks.
Geology & Origin
Mount Saint Hilaire is renowned for its exceptional mineral diversity, formed through unique alkaline magmatism followed by hydrothermal alteration. More than 400 mineral species have been identified there, including numerous type localities. The specimens in this flat show typical associations of dark matrix rock with lighter, sometimes rare silicate and carbonate minerals. As a unique piece from the historical Gerd Tremmel collection, this flat provides an authentic cross-section of one of the world’s most significant mineral localities.