Grossular gallery 2

GROSSULAR Gallery Return to Grossular page. Click on image for larger view

GROSSULAR Joppa Hill Locale, Amherst, NH 5 cm specimen	Species: GROSSULAR Locality: Joppa Hill Locale, Amherst, NH Specimen Size: 5 cm specimen Field Collected: Tom Mortimer Catalog No.: 741 Notes: This is a natural sunlight (cloudy day) photo.
GROSSULAR Joppa Hill Locale, Amherst, NH 1.1 cm grossular crystal in 4.2 cm specimen	Species: GROSSULAR Locality: Joppa Hill Locale, Amherst, NH Specimen Size: 1.1 cm grossular crystal in 4.2 cm specimen Field Collected: Tom Mortimer Catalog No.: 1463 Notes: Grossular crystals totally embedded in quartz are usually the best formed.
GROSSULAR South side Garnet Hill, Sugar Hill, NH 2 cm specimen with subhedral grossular garnet.	Species: GROSSULAR Locality: South side Garnet Hill, Sugar Hill, NH Specimen Size: 2 cm specimen with subhedral grossular garnet. Field Collected: Joey Vaughan Catalog No.: u2168 Notes: Not remarkable as NH garnet specimens go, but I thought this might be the uncommon andradite species which I have confirmed from the Franconia Iron Mine, also in Sugar Hill. Andradite chemistry is: Ca₃Fe³⁺₂(SiO₄)₃ . Grossular chemistry is: Ca₃Al₂(SiO₄)₃ . The chemistry of this garnet from EDS analysis is: Ca_1.69(Fe_1.03,Mn_0.20)Al₂(SiO₄)₃ , normalized for two atoms of Al. A calcium garnet with Al > (Fe + Mn) indicates a grossular garnet with a moderate andradite component.
GROSSULAR Joppa Hill, Amherst, NH 9 mm grossular crystal, no matrix	Species: GROSSULAR Locality: Joppa Hill, Amherst, NH Specimen Size: 9 mm grossular crystal, no matrix Field Collected: Tom Mortimer Catalog No.: 787 Notes: Grossular at Joppa hill has a wide range of color, from pale green to wine red. This one is more orange than most.
GROSSULAR with Diopside Joppa Hill Locale, Amherst, NH 18 mm field of view. Skeletal grossular crystal in photo center with internal green diopside in calcite matrix.	Species: GROSSULAR with Diopside Locality: Joppa Hill Locale, Amherst, NH Specimen Size: 18 mm field of view. Skeletal grossular crystal in photo center with internal green diopside in calcite matrix. Field Collected: Bob Janules Catalog No.: A Bob Janules specimen Notes: This skeletal grossular crystal was exposed by soaking the specimen in vinegar (a weak acid) for several days to dissolve the enclosing calcite. The interior of the skeletal crystal has small diopside crystals embedded in white calcite. An interesting paragenesis development.
GROSSULAR Joppa Hill Locale, Amherst, NH 5 mm grossular crystal on larger grossular crystal	Species: GROSSULAR Locality: Joppa Hill Locale, Amherst, NH Specimen Size: 5 mm grossular crystal on larger grossular crystal Field Collected: Tom Mortimer Catalog No.: u2483 Notes:
GROSSULAR Joppa Hill Locale, Amherst, NH About a 3 inch specimen. Grossular garnet crystals in a diopside-quartz matrix.	Species: GROSSULAR Locality: Joppa Hill Locale, Amherst, NH Specimen Size: About a 3 inch specimen. Grossular garnet crystals in a diopside-quartz matrix. Field Collected: Unknown Catalog No.: A Maine Mineral and Gem Museum display specimen. Notes: An iPhone snapshot through glass case, 4/2023.
GROSSULAR Beech Hill, Warren, NH 6 cm specimen	Species: GROSSULAR Locality: Beech Hill, Warren, NH Specimen Size: 6 cm specimen Field Collected: ex. L. L. Hubbard (1849 - 1933) Catalog No.: A Don Dallaire specimen (#2736) and photo Notes: [dd] "I purchased it from the Seaman Museum store in August 2003. I also purchased another specimen from the same location that was larger, but the garnets were smaller. The Seaman Museum got a donation of specimens from an L. L. Hubbard. They kept the 2 best specimens for the museum and they were larger and far better quality (they would not sell those to me, I asked)." [tm] I made two trips to find this skarn locality. I was unsuccessful. I did find some micro crystals of grossular in a brookside boulder (see below), suggesting that I was in the right area or formation.
GROSSULAR Beech Hill, Warren, NH 1.8 mm field of view	Species: GROSSULAR with green diopside Locality: Beech Hill, Warren, NH Specimen Size: 1.8 mm field of view Field Collected: Tom Mortimer Catalog No.: u1811 Notes: The grossular crystals are sub-hedral. Not a remarkable specimen, but a confirmation of a skarn occurrence on Beech Hill, Warren. This has been a "lost locality" for decades.
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