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January 12, 2016

3-M Hourglass

Filed under: Item of the Day — Jason Onerheim @ 12:01 am

Hourglass, box, information card and information sheet commemorating the centennial of 3M in 2002. The card reads in part, “This unique, commemorative hourglass contains finely ground rock mined from 3M’s original Crystal Bay site. 3M was founded to mine this mineral which was believed to be corundum – but is actually a rock known as anorthosite.”

For more information or to purchase a photograph of this item, view this hourglass in our collections database.

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