New Gallery #177

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Photos recently added to NH species galleries, set #177.
NEPHELINE - visual ID Red Hill, Moultonboro, NH Hexagonal crystal, 0.36 mm length	Species: NEPHELINE - visual ID Locality: Red Hill, Moultonboro, NH Specimen Size: Hexagonal crystal, 0.36 mm length Field Collected: Tom Mortimer October, 2004. Catalog No.: u492 Notes: The crystal was revealed from inside a broken hastingsite. A candidate nepheline crystal. Nepheline crystals are hexagonal.
ANATASE Audley Quarry, Merrimack, NH Largest crystal 0.9 mm	Species: ANATASE Locality: Audley Quarry, Merrimack, NH Specimen Size: Largest crystal 0.9 mm Field Collected: Tom Mortimer Catalog No.: u2046 Notes: Photo from image stack taken with Hayear camera.
RIEBECKITE var. Crocidolite Hurricane Mtn. Conway, NH 5 cm specimen with blue crocidolite in quartz-feldspar matrix. Green arrow points to EDS sample grain site.	Species: RIEBECKITE var. Crocidolite Locality: Hurricane Mtn. Conway, NH Specimen Size: 5 cm specimen with blue crocidolite in quartz-feldspar matrix Field Collected: Leroy Grant -1970's Catalog No.: 2170 Notes: An EDS analysis (BC502, a weight % oxide analysis) had the required elements for riebeckite, but the Na value was low and the Fe value was high for riebeckite. Chemistry from BC502 analysis: Na_1.01Fe_8.13Al_0.07Si_7.13O₂₃ normalized for 23 O. Al Falster of the MMGM lab acquired an EDS analysis from this same polished grain. Al's plot amplitudes are similar to the BC analysis, but weight % oxide values were not provided. For reference: Ideal riebeckite chemistry (mindat, 2023): [ ]Na₂(Fe²⁺₃Fe³⁺₂)Si₈O₂₂(OH)₂ RUFF empirical chemistry (R050082.2): ([ ]_0.63,Na_0.19K_0.18)(Na_1.58Ca_0.42)_Σ=2Fe²⁺_3.00(Fe³⁺_1.30Fe²⁺_0.45Mn_0.15Mg_0.05Ti_0.05)_Σ=2(Si_0.98Al_0.02)₈O₂₂(OH)₂ A 1996 Canadian Mineralogist article by Foord et. al. , article link "Li. AND F.BEARING ALKALI AMPHIBOLE FROM GRANITIC PEGMATITE AT HURRICANE MOUNTAIN, CARROLL COUNTV, NEW HAMPSHIRE" gave an empirical chemistry for a Hurricane Mtn. fibrous riebeckite as: (Na_1.82K_0.05Ca_0.01)_Σ=1.88(Fe²⁺_2.44Li_0.06Mg_0.02BeO_0.02Mn_0.01Z_0.06O_0.01)_Σ=2.56 (Fe³⁺_2.42Ti_0.01Zr_0.02Sn_0.01Nb_0.01)_Σ=2.56(Si_7.85Al_0.01P_0.01)_Σ=7.96O_23.2 Good grief ! If all the the tiny cation amounts are removed from this formula, we are left with: Na_1.82(Fe²⁺_2.44Fe³⁺_2.42)Si_7.85O_23.2 reasonably close to the ideal riebeckite formula given above.
MOLYBDENITE Holts Ledge Locale, Lyme, NH 8 mm molybdenite crystal on quartz	Species: MOLYBDENITE Locality: Holts Ledge Locale, Lyme, NH Specimen Size: 8 mm molybdenite crystal on quartz Field Collected: Tom Mortimer Catalog No.: 663 Notes: These molybdenite crystals were enclosed in quartz. A fortunate few were nicely exposed like this one.
HUREAULITE Palermo Mine, Groton, NH 0.4 mm field of view	Species: HUREAULITE Locality: Palermo Mine, Groton, NH Specimen Size: 0.4 mm field of view Field Collected: From a crate of Palermo rocks gifted by Bob Whitmore Catalog No.: u1526 Notes:
WHITMOREITE Palermo Mine, Groton, NH 0.78 mm whitmoreite naval mine	Species: WHITMOREITE Locality: Palermo Mine, Groton, NH Specimen Size: 0.78 mm whitmoreite naval mine Field Collected: Bob Wilken Catalog No.: A Bob Wilken collection specimen Notes:
PYRITE Mine Falls Park, Nashua, NH 3 mm field of view	Species: PYRITE Locality: Mine Falls Park, Nashua, NH Specimen Size: 3 mm field of view Field Collected: Curt LaPlante Catalog No.: NC - green label Notes:
EULYTINE ? Holts Ledge Locale, Lyme, NH 2.5 mm field of view	Species: EULYTINE ? Locality: Holts Ledge Locale, Lyme, NH Specimen Size: 2.5 mm field of view Field Collected: Tom Mortimer - 2004 Catalog No.: 554 Notes: A candidate eulytine. A cross-section view of broken radial ball. It has pearly luster areas. Mindat shows some eulytine photos with a milky radial ball habit. Eulytine is a bismuth silicate, Bi₄(SiO₄)₃ and bismuthinite is moderately common in the area that this was found. This is the only specimen collected, so a grain for EDS is not an option. Only hope would be for a Raman analysis.
EULYTINE ? Holts Ledge Locale, Lyme, NH 3 mm field of view	Species: EULYTINE ? Locality: Holts Ledge Locale, Lyme, NH Specimen Size: 3 mm field of view Field Collected: Tom Mortimer - 2004 Catalog No.: 554 Notes: Backside of specimen 554. A second small ball is in the lower left. Acicular tourmaline crystals penetrate the balls.
AURICHALCITE Stoddard Mine, Westmoreland, NH 3.2 mm field of view AURICHALCITE Stoddard Mine, Westmoreland, NH 1.0 mm field of view	Species: AURICHALCITE Locality: Stoddard Mine, Westmoreland, NH Specimen Size: 3.2 mm field of view and 1.0 mm FOV close-up Field Collected: Tom Mortimer Catalog No.: u2659 Notes: Reviewing my lot of un-cataloged Stoddard malachite micros collected years ago, I found this. Visually, a good match for aurichalcite. A couple of typical Stoddard Mine micro barite crystals are also on this specimen. Aurichalcite has not been previously reported from the Stoddard Mine.
DRAVITE Vacinity of Purgatory Falls, Mt. Vernon, NH 2 cm field of view	Species: DRAVITE Locality: Vacinity of Purgatory Falls, Mt. Vernon, NH Specimen Size: 2 cm field of view Field Collected: Tom Mortimer - 1991 Catalog No.: NC Notes: Dravite is a visual ID, based on dark brown color and analyzed dravite specimens from other near-by Hillsboro County specimens. Matrix is mica schist.