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Photos recently added to NH species galleries, set #133.
Highslide JS
COLUMBITE with Sphalerite    Colony Mine, Alstead, NH
11 cm specimen. Columbite and sphalerite in feldspar matrix


Highslide JS
COLUMBITE    Colony Mine, Alstead, NH
1.5 cm crystal


Highslide JS
COLUMBITE    Colony Mine, Alstead, NH
2.6 cm specimen


Highslide JS
COLUMBITE    Colony Mine, Alstead, NH
1.5 mm columbite crystal


Highslide JS
COLUMBITE    Colony Mine, Alstead, NH
6.5 mm columbite crystal


Highslide JS
COLUMBITE    Colony Mine, Alstead, NH
Label glued to bottom of specimen before breakdown
Species:           COLUMBITE  
Locality:          Colony Mine, Alstead, NH
Specimen Size: Top photo: 11 cm specimen before break-up. Second photo: 1.5 cm crystal extracted from pegmatite chunk. Other photo sizes as annotated.
Field Collected: A purchased specimen from a known friend. Collected 1998.
Catalog No.: 2133
Notes: Crystal (second photo) was dislodged in trim from the six inch pegmatite chunk, top photo. The crystal was restored to the matrix for my collection. The surrounding redish-brown mineral is sphalerite.
 At the May 2020 time of this photo, this is the best-formed, cm plus sized, NH columbite crystal photo known to me [tm].
 Two micro-boxed columbite crystals were also extracted from the original 5 pound rock, u2369 & u2370, photos included here.
 What is interesting, and perhaps significant, is that I can find no instance in mindat's million plus photos of columbite in close association with sphalerite. (and in this Colony Mine case embedded in sphalerite).
 Jim Nizamoff opined on seeing these photos: "Columbite is not usually directly associated with sphalerite although it often crystallizes in the same zone or area of a pegmatite. Are you absolutely sure that the matrix is sphalerite? Several pegmatites here in Maine contain similar stuff although I donít recall them having such a direct association (Estes Q is one). I would expect that several NH pegmatites would be capable of producing similar quality columbite (Turner, Chickering, or Chandler) although I doubt that it would be with a ton of sphalerite."
  Ray Meyers, on seeing these photos, recalled that I had already analyzed this columbite and sphalerite. Checking my EDS notebook (logging over 500 analyses) showed Ray was correct. The EDS analysis of the columbite indicated a chemistry of (Fe0.53,Mn0.47)(Nb0.48,Ta0.02)O5.8 . This is close to the midpoint of columbite-(Fe) and columbite-(Mn). The analysis Nb + Ta is low. The APFU was normalized for Fe + Mn = 1. Arrow in the top photo indicates site of analysis grain source.
  The sphalerite was also analyzed (addressing Jim's uncertainty). The EDS analysis confirmed sphalerite with moderate iron content Zn0.8Fe0.2S1.15 . Checking sphalerite analyses in Dana's System of Mineralogy (Seventh edition, vol 1) there is a ferroan sphalerite: "dark colored varieties with more than ten per cent Fe." The BC analysis indicated 9.97 atomic % Fe... close enough to the 10% threshold that I will call this ferroan sphalerite.
Highslide JS
OPAL var. Hyalite    Hurricane Mtn. Conway, NH
10 mm field of view
Species:           OPAL var. Hyalite  
Locality:          Hurricane Mtn. Conway, NH
Specimen Size: 10 mm field of view
Field Collected: Leroy Grant - early '70's
Catalog No.: NC
Notes: A voucher specimen for hyalite opal on Hurricane Mtn. A no stacking photo.
This hyalite has a bright green fluorescence in SW UV.
Highslide JS
QUARTZ    Conway area, NH
4 inch, double-terminated crystal
Species:           QUARTZ  
Locality:          Conway area, NH
Specimen Size: 4 inch, double-terminated crystal
Field Collected: Peter Samuelson
Catalog No.: 430
Notes: Purchased from Bill Ross (base of Hurricane Mtn., Conway, NH), May, 1983. $5.00.
Possibly from Peter's Dianna's Bath find.
Highslide JS
ASTROPHYLLITE    Hurricane Mtn., Conway, NH
9 mm field of view
Species:           ASTROPHYLLITE  
Locality:          Hurricane Mtn., Conway, NH
Specimen Size: 9 mm field of view
Field Collected: Leroy Grant -1970's
Catalog No.: u2371
Notes: Astrophyllite blades on quartz. Hyalite opal in top rear, crocidolite (blue) in foreground.
Highslide JS
ASTROPHYLLITE    Hurricane Mtn., Conway, NH
9 mm vertical field of view
Species:           ASTROPHYLLITE  
Locality:          Hurricane Mtn., Conway, NH
Specimen Size: 9 mm vertical field of view
Field Collected: Leroy Grant -1970's
Catalog No.: u2371
Notes: Golden astrophyllite hairs in quartz crystal.
Highslide JS
RIEBECKITE var. Crocidolite    Hurricane Mtn., Conway, NH
2.2 cm field of view
Species:           RIEBECKITE var. Crocidolite  
Locality:          Hurricane Mtn., Conway, NH
Specimen Size: 2.2 cm field of view
Field Collected: Leroy Grant -1970's
Catalog No.: u2371
Notes: Mat of blue crocidolite on smoky quartz crystal with astrophyllite.
Highslide JS
MUSCOVITE - fine grain   Locality: Vacinity of Mascot Mine, Gorham, NH
4.5 cm specimen with green, soft - hardness ~ 2.5, mica in milky quartz matrix.


Highslide JS
MUSCOVITE - fine grain   Locality: Vacinity of Mascot Mine, Gorham, NH
7 mm mica crystal associated with fine-grained mica.

Species:           MUSCOVITE - fine grain
Locality:          Vacinity of Mascot Mine, Gorham, NH
Specimen Size: 4.5 cm specimen with green, (soft - hardness ~ 2.5), mica in milky quartz matrix
Field Collected: Richard Orsillo
Catalog No.: NC
Notes: Silvery mica books embedded in fine-grained mica is unusual.
Highslide JS
CHABAZITE var. Phacolite    Pike-Wilton Quarry, Wilton, NH
5 mm chabazite crystal
Species:           CHABAZITE var. Phacolite  
Locality:          Pike-Wilton Quarry, Wilton, NH
Specimen Size: 5 mm chabazite crystal
Field Collected: Tom Mortimer - 2014 (Authorized visit)
Catalog No.: u1490
Notes: A re-do of a 2014 photo. B&L 4X objective, fluorescent ring light, 151 image stack.
Highslide JS
ROCKBRIDGEITE    Palermo #1 Mine, N. Groton, NH
0.6 mm clump of rockbridge on mitridatite
Species:           ROCKBRIDGEITE  
Locality:          Palermo #1 Mine, N. Groton, NH
Specimen Size: 0.6 mm clump of rockbridge on mitridatite
Field Collected: From a tub of Palermo phosphate rocks gifted by Bob Whitmore
Catalog No.: u1889
Notes: A re-do of a 2014 photo. Nikon Plan 10 objective.