Almandine from
Rollstone Hill Quarries, Fitchburg, Worcester County, Massachusetts, USA
| Locality type: | Quarry | |
| Classification | ||
|---|---|---|
| Species: | Almandine | |
| Formula: | Fe32+Al2(SiO4)3 | |
| Comments: | According to Hitchen (1935), the garnets on Rollstone Hill are "spessartitic almandite." He gave an analysis of 52.29% almandine, 41.53 % spessartine, 0.92 % pyrope, and 3.55% andradite. The results of an SEM-EDS analysis by Kerry Day 2008 for a garnet specimen collected by Peter Cristofono showed approximately ~ 55% almandine, 45% spessartine. | |
| Habit: | "Trapezohedron n(211) and the dodechedron d(110)in combination, the former being usually dominant" (Hitchen, 1935) | |
| Colour: | red, orange-red, orange, pink | |
| Abundance at site: | Rare | |
| Confirmation | ||
| Validity: | Confirmed | |
| Confirmation Methods: | SEM-EDS | |
| Confirmation Details: | Where Tested and Reference ID: Hitchen, 1935 | |
| Associated Minerals Based on Photo Data: | ||
| Schorl | 1 | |
| Data | ||
| Mineral Data: | Click here to view Almandine data | |
| Locality Data: | Click here to view Rollstone Hill Quarries, Fitchburg, Worcester County, Massachusetts, USA | |
| Photo Gallery | View Gallery (2 photos) | |
| Data Identifiers | ||
| Mindat Occurrence Record ID: | 38572 | |
| Long-form Identifier: | 1:3:38572:5 | |
| GUID (UUID V4): | 0 | |
| Nearest other occurrences of Almandine | ||
| 8.4km (5.2 miles) | ⓘLong Hill, Leominster, Worcester County, Massachusetts, USA | |
| 22.1km (13.7 miles) | ⓘQuabbin Aqueduct Shaft #2 locality, Holden, Worcester County, Massachusetts, USA | |
| 22.6km (14.1 miles) | ⓘQuabbin Aqueduct Shaft #4 locality, Holden, Worcester County, Massachusetts, USA | |
| 29.9km (18.6 miles) | ⓘInterstate 290/Interstate 495 interchange road cuts, Marlborough, Middlesex County, Massachusetts, USA | |
| 30.1km (18.7 miles) | ⓘReynolds Mine (Beryl Hill Mine), Royalston, Worcester County, Massachusetts, USA | |
| 32.5km (20.2 miles) | ⓘWorcester Coal Mine, Worcester, Worcester County, Massachusetts, USA | |
| 32.6km (20.2 miles) | ⓘWilton Crushed Stone Quarry, Wilton, Hillsborough County, New Hampshire, USA | |
| 32.8km (20.4 miles) | ⓘRoute 101A construction site, Merrimack, Hillsborough County, New Hampshire, USA | |
| 34.2km (21.3 miles) | ⓘWebb Granite Quarry, Fitzwilliam, Cheshire County, New Hampshire, USA | |
| 35.2km (21.9 miles) | ⓘMarlborough Junction locality, Marlborough, Middlesex County, Massachusetts, USA | |
| References | ||
Rollstone Hill Quarries, Fitchburg, Worcester County, Massachusetts, USA