Hemimorphite gallery

HEMIMORPHITE Gallery Return to Hemimorphite page. Click on image for larger view
HEMIMORPHITE Madison Lead Mine, Madison, NH 2.5 mm spray of bladed hemimorphite crystals on sphalerite HEMIMORPHITE Madison Lead Mine, Madison, NH Close up of hemimorphite crystals, 1.0 mm fov.	Species: HEMIMORPHITE Locality: Madison Lead Mine, Madison, NH Specimen Size: 2.5 mm spray of bladed hemimorphite crystals on sphalerite. Close-up view 1 mm fov. Field Collected: Tom Mortimer Catalog No.: Notes:
HEMIMORPHITE Madison Lead Mine, Madison, NH 1.0 mm cluster of hemimorphite crystals	Species: HEMIMORPHITE Locality: Madison Lead Mine, Madison, NH Specimen Size: 1.0 mm cluster of hemimorphite crystals Field Collected: Tom Mortimer Catalog No.: u513 Notes: A stack of 31 images processed with Helicon Focus.
HEMIMORPHITE Johnson Rd., Bow, NH 0.1 mm hemimorphite cluster on oxide coated quartz crystal HEMIMORPHITE Johnson Rd., Bow, NH 0.1 mm hemimorphite cluster on oxide coated quartz crystal	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 0.1 mm hemimorphite cluster on oxide coated quartz crystal, with second zoomed view Field Collected: 2016 Catalog No.: u2134 Notes:[tm] This is only the second occurrence I have seen of New Hampshire hemimorphite. EDS verification would be reassuring. There is another Pb mineral with a similar morphology, dundasite, PbAl₂(CO₃)₂(OH)₄ · H₂O Hemimorphite chemistry is: Zn₄Si₂O₇(OH)₂ · H₂O , so EDS differentiation should be straightforward.
HEMIMORPHITE Johnson Rd., Bow, NH 0.7 mm hemimorphite cluster on quartz crystal	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 0.7 mm hemimorphite cluster on quartz crystal Field Collected: 2016 Catalog No.: u2140 Notes: Hemimorphite is a very late stage mineral at this Bow locality. It is found on oxide coated quartz crystals and in and on masses of goethite. The habit is typical for hemimorphite: clusters of lustrous, fan-like, sprays. Individual crystals rarely exceed one-half mm.
HEMIMORPHITE Johnson Rd., Bow, NH 1.2 mm hemimorphite	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 1.2 mm hemimorphite Field Collected: 2016 Catalog No.: u2203 Notes:
HEMIMORPHITE Johnson Rd., Bow, NH 1.2 mm hemisphere of crystals HEMIMORPHITE Johnson Rd., Bow, NH 1.2 mm hemisphere of crystals, SW UV HEMIMORPHITE Johnson Rd., Bow, NH 1.3 mm hemimorphite crystals, SW UV on TN specimen	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 1.2 mm hemisphere of crystals. SW UV image below Field Collected: Tom Mortimer Catalog No.: TBC Notes: From a 50 image stack with Nikon objective. I had no idea what this was. My best quess was smithsonite. When I forwarded the photo to Peter Cristofono, he suggested I check it with UV. I did this and observed the intense green fluorescence. When Peter saw this, he opined that this was very likely willemite, Zn₂SO₄. Peter stated that the only other reported New England occurrence was from the Copper Valley Mine in New Haven, CT. (The mindat.org photo of this shows a "Massive [10 mm] aggregate of tiny, white willemite crystals". The Bow specimens are excellent in comparison. Based on his sulfide ore vein collecting in the southwest, Bob Wilken also independently suggested a willemite ID. I shared Bow samples from my limited supply with several MMNE members at the symposium. Fred Davis, with occasional access to a Raman spectroscopy instrument, was able to provide an analysis. The Raman analysis gave a very good match for hemimorphite. In the email that accompanied the plot, Fred stated: “saw the bright fluorescence. Got it in the Raman and [was] shocked - hemimorphite. Probed all over the fragment, 6 or 7 different locations - the results were very consistent. I really wanted it to be willemite”. A June 2018 EDS analysis (BC291) indicated a simple zinc silicate, consistent with hemimorphite.
HEMIMORPHITE Johnson Rd., Bow, NH 1 mm field of view	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 1 mm field of view Field Collected: 2016 Catalog No.: A Fred Davis specimen and photo Notes:
HEMIMORPHITE Johnson Rd., Bow, NH 2.3 mm hemimorphite crystal cluster	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 2.3 mm hemimorphite crystal cluster Field Collected: 2016 Catalog No.: A Bob Wilken specimen and photo Notes:
HEMIMORPHITE Johnson Rd., Bow, NH 3 mm hemimorphite crystal	Species: HEMIMORPHITE Locality: Johnson Rd., Bow, NH Specimen Size: 3 mm hemimorphite crystal Field Collected: 2016 Catalog No.: A Bob Wilken specimen and photo Notes:
HEMIMORPHITE Madison Lead Mine, Madison, NH 1.0 mm field of view	Species: HEMIMORPHITE Locality: Madison Lead Mine, Madison, NH Specimen Size: 1.0 mm field of view. Field Collected: Tom Mortimer Catalog No.: u511 Notes:
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