Rare Quartz , Calcite and Stilpnomelane Crystal Cluster from Rocarri Quarry

Rare Quartz , Calcite and Stilpnomelane Crystal Cluster from Roncarri Quarry , East Granby, Connecticut. Weight- 350g Size - 4.5" long- 3.5" wide While quartz and calcite are generally common minerals worldwide, the specific association of quartz and calcite crystals with a rich covering of golden-brown stilpnomelane (or hematite staining) from the Roncari Quarry in East Granby, Connecticut, is distinctive and less common for the locality.