Strengite gallery

STRENGITE Gallery Return to Strengite page. Click on image for larger view
Strengite and phosphosiderite are dimorphs. They both have the same chemistry, so cannot be differentiated by EDS analysis. They both also occur in a habit of small ball-aggregates. [tm] I have assigned the pink to lavender balls to be strengite and the blue to purple balls to be phosphosiderite. This may, or may not be, correct.
STRENGITE Palermo Mine N. Groton, NH 1.2 cm field of view. Rockbridgeite vug filled with pale lavender strengite crystals.	Species: STRENGITE Locality: Palermo Mine, N. Groton, NH Specimen Size: 1.2 cm field of view. Rockbridgeite vug filled with pale lavender strengite crystals. Field Collected: ex. Bill Henderson Catalog No.: A Joe Mulvey specimen, ex. Bill Henderson Notes:
STRENGITE Fletcher Mine, N. Groton, NH 1.2 mm field of view STRENGITE Fletcher Mine, Groton, NH 1.1 mm field of view	Species: STRENGITE Locality: Fletcher Mine, N. Groton, NH Specimen Size: 1.2 mm field of view, top photo Field Collected: Clayton Ford ? Catalog No.: u959 Notes: Gift from Gordon Jackson. Matt Butler examined some small grains from this specimen with a polarizing microscope and reported: "looking at the pink crushed grains I see interference colors but no noticeable pleochroism so maybe strengite." A second photo Jan., 2022.
STRENGITE Fletcher Mine, N. Groton, NH 4 mm field of view. Lavender strengite balls with black rockbridgeite on yellow unknown crystalline matrix.	Species: STRENGITE Locality: Fletcher Mine, N. Groton, NH Specimen Size: 4 mm field of view. Lavender strengite balls with black rockbridgeite on yellow unknown crystalline matrix. Field Collected: Clayton Ford, 1960's. Acquired by Gordon Jackson 9/22/03. Gifted to T. Mortimer 3/19/16. Catalog No.: u1957 Notes: Analytically, even quantitative EDS cannot differentiate stengite from phosphosiderite. Both have one P, one Fe, and two waters. Granted strengite is orthorhombic and phosphosiderite is monoclinic, but with a ball form, there is nothing to go by. On mindat.org, there are 216 strengite photos and 829 phosphosiderite photos, (Mar. 2016). About a third of each of these are ball form and both species have photos of pale violet and pale blue balls. I think the New England collecting community has a preference for naming the violet balls as strengite. And then we also have koninckite, that has essentially the same chemistry, but one less water and also forms pale pink balls.
STRENGITE with Rockbridgeite Fletcher Mine, N. Groton, NH 2.2 mm fov.	Species: STRENGITE with Rockbridgeite Locality: Fletcher Mine, N. Groton, NH Specimen Size: 2.2 mm fov Field Collected: Clayton Ford. Ex. Gordon Jackson Catalog No.: u1957 Notes:
STRENGITE Fletcher Mine, N. Groton, NH 2.8 mm field of view	Species: STRENGITE Locality: Fletcher Mine, N. Groton, NH Specimen Size: 2.8 mm field of view Field Collected: Inge Jewel Catalog No.: A Bob Wilken collection specimen Notes: Bob Wilken identification.
STRENGITE Fletcher Mine, N. Groton, NH 0.3 mm strengite crystal STRENGITE Fletcher Mine, N. Groton, NH 2.2 mm field of view	Species: STRENGITE Locality: Fletcher Mine, N. Groton, NH Specimen Size: 0.3 mm strengite crystal, top photo. Field Collected: Clayton Ford. A gift from Gordon Jackson Catalog No.: u957 Notes: Crystals are in a small vug in rockbridgeite.
STRENGITE Valencia Mine, Groton, NH 0.15 mm white strengite crystals on rockbridgeite STRENGITE Valencia Mine, Groton, NH 0.15 mm white strengite crystal on rockbridgeite STRENGITE Valencia Mine, Groton, NH 0.15 mm white strengite crystals on rockbridgeite	Species: STRENGITE Locality: Valencia Mine, Groton, NH Specimen Size: 0.15 mm white strengite crystals on rockbridgeite Field Collected: Dana Jewell - 1989 Catalog No.: u2645 Notes: An EDS analyses , VAL06 result indicated strengite with a bit of Al, an allowed minor element in strengite per mindat.org.