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- Description:
- On reverse: "Chlorastrolite (Greenstone) - is the "official state gem" of Michigan. It is a variety of the mineral pumpellyite and is found chiefly as small, green, rounded beach pebbles, showing a turtleback pattern. Greenstones can still be found on Isle Royale and on some of the mine waste piles of the Copper Country, although it is a rare mineral".
- Data Provider:
- Capital Area District Library (Lansing, MI). Forest Parke Library and Archives
- Collection:
- Caterino Postcard Collection
- Description:
- On reverse: "Chlorastrolite (Greenstone) - is the "official state gem" of Michigan. It is a variety of the mineral pumpellyite and is found chiefly as small, green, rounded beach pebbles, showing a turtleback pattern. Greenstones can still be found on Isle Royale and on some of the mine waste piles of the Copper Country, although it is a rare mineral".
- Data Provider:
- Capital Area District Library (Lansing, MI). Forest Parke Library and Archives
- Collection:
- Caterino Postcard Collection
- Notes:
- 3 p.l., [iii]-xii, 292 p. incl. front., illus., plates. 20 cm.
- Data Provider:
- University of Michigan. Libraries
- Collection:
- New York,: Scribner, Armstrong, and company, and Ann Arbor, Michigan: University of Michigan Library
