- Name:
- M67
- Description:
Calcite; large chunk showing cleavage; Perkiomen mine
- Accession Number:
- 2023.1.67
- Collection:
- Category:
- Mineralogy
- Origin Continent:
- North America
- Origin Country:
- United States
- Origin State/Province:
- PA
- Origin City/Town:
- Mongomery County
