Polylithionite and Aegirine Crystal Cluster | 8.97 grams | Poudrette Quarry, Mont-Saint-Hilaire, Canada Microcline Big Cottonwood Mining District

Big Cottonwood Mining District

They are a very interesting IAB-MG iron discovered in 1891 and there is an estimated 30 MT of this material

The gemstone is relatively uncommon

helping with decision-making

Polylithionite and Aegirine Crystal Cluster | 8.97 grams | Poudrette Quarry, Mont-Saint-Hilaire, Canada Microcline Big Cottonwood Mining DistrictPolylithionite and Aegirine from Poudrette Quarry, Mont Saint Hilaire (MSH), Quebec, represent a classic mineral association from one of the world's most important alkaline intrusive complexes. Polylithionite is a rare lithium rich mica that typically forms thin, lustrous hexagonal plates or rosettes with a silvery, pearly, or pale bronze appearance. It commonly occurs alongside Aegirine, which develops as long, dark green to black prismatic crystals