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Cogwheels of bournonite are up against colourful vesuvianite.
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Grossular from
Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA


01941290017272028087423.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06260600017272028201201.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06075550017272037346135.jpg
Hessonite

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
08201550017272028202916.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
01941290017272028087423.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06260600017272028201201.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06075550017272037346135.jpg
Hessonite

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06914480017364300529337.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
01941290017272028087423.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06260600017272028201201.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
06075550017272037346135.jpg
Hessonite

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
08201550017272028202916.jpg
Grossular

Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
Locality type:Hill
Classification
Species:Grossular
Formula:Ca3Al2(SiO4)3
Comments:Note: Lighter colored garnets from Joppa Hill have long been called grossular. A darker red garnet was analyzed by SEM-EDS and found to be grossular as well. Ca>Fe>Mn. (P. Cristofono specimen, analysis done by Kerry Day, 2008.)
Habit:good crystals
Colour:cinnamon-brown, tan, red
Quality for species:Good crystals or rich for species - important (!)
Abundance at site:Common
Confirmation
Validity:Confirmed
Confirmation Methods:Visually Identified, SEM-EDS
Associated Minerals:
Associates:Calcite
Diopside
Quartz
Vesuvianite
Associated Minerals Based on Photo Data:
Scheelite1
Ferro-hornblende1
Fluorapatite1
Titanite1
Diopside1
Data
Mineral Data:Click here to view Grossular data
Locality Data:Click here to view Joppa Hill, Amherst, Hillsborough County, New Hampshire, USA
Photo GalleryView Gallery (9 photos)
Data Identifiers
Mindat Occurrence Record ID:51176
Long-form Identifier:1:3:51176:4
GUID (UUID V4):0
Nearest other occurrences of Grossular
1.3km (0.8 miles) ⓘPulpit Road locality, Bedford, Hillsborough County, New Hampshire, USA
16.6km (10.3 miles) ⓘWilton Crushed Stone Quarry, Wilton, Hillsborough County, New Hampshire, USA
34.3km (21.3 miles) ⓘPJ Keating Quarry (Dracut Quarry; Condon Quarry; Essex Bituminous), Dracut, Middlesex County, Massachusetts, USA
48.3km (30.0 miles) ⓘOld Limestone Quarry Site, Boxborough, Middlesex County, Massachusetts, USA
52.1km (32.4 miles) ⓘRoute 114 calc-silicate locality, North Andover, Essex County, Massachusetts, USA
55.1km (34.2 miles) ⓘBolton Lime Quarries (Bolton Quarry; Whitcomb Quarry; Hildreth Quarry), Bolton, Worcester County, Massachusetts, USA
60.0km (37.3 miles) ⓘDevil's Den (Devil's Den lime pit), Newbury, Essex County, Massachusetts, USA
67.0km (41.7 miles) ⓘMarlborough Junction locality, Marlborough, Middlesex County, Massachusetts, USA
74.7km (46.4 miles) ⓘMillstone Hill Quarry, Worcester, Worcester County, Massachusetts, USA
86.8km (53.9 miles) ⓘWebster prospects (Sanford vesuvianite locality; Goodall Farm prospect; Webster vesuvianite prospect), Sanford, York County, Maine, USA
References
Cristofono, Peter (n.d.) Personal communication.
Smith, Arthur E. (2005) New Hampshire mineral locality index. Rocks & Minerals, 80 (4) 242-261 doi:10.3200/rmin.80.4.242-261
 
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