$2,375Median
12Sold (12 mo)
$3,250Last sale
Diaspore with Margarite, Chloritoid
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Classic old New England specimen crystalline and massive diaspore on matrix with margarite and chloritoid. The specimen comes with an antique label as shown at the end of the video and dates to the very early 20th century. The Chester Emery Mines in Chester, Massachusetts began as magnetite iron workings in the mid 1800s, but by 1864 the material was recognized as emery (granular corundum) mixed with iron minerals, shifting the district into an important early US source of abrasive ore. Mining and milling expanded in the late 1800s, then declined as markets and economics changed, leaving the mines as classic historic localities for both emery and collector minerals.
Product details
SpeciesDiaspore, Chloritoid
SizeSmall Cabinet
Dimensions8.5 x 7.0 x 3.0 cm
Added on02/27/2026
LocalityUSA, Massachusetts, Berkshire County
Current owner
Unknown Owner
- Acquired
- Jun 2026
- Price paid
- $290.00
Previous owners
| Date | Collector | Acquisition price |
|---|---|---|
| — | Weinrich Minerals | Not disclosed |
Comments