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Apatite
Huron River near Milan, OH
Crystal is 0.56 mm across
composite of 7 images (Author: Pete Richards)
Apatite
Huron River near
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Barite and calcite
France Stone Co. Quarry
Flat Rock, Ohio
Barite crystal group is 5.2 mm across the base. (Author: Pete Richards)
Barite and calcit
France Stone Co.
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Calcite from Minnesota, modified image (Author: Pete Richards)
Calcite from Minnesota, modified i
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Calcite, Blacksburg, Virginia. Crystal 1 mm across the top. RPR #4656. (Author: Pete Richards)
Calcite, Blacksburg, Virginia. Cr
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Drawings of an interpretation of the Alme calcite habit. Top, standard crystallographic orientation. Bottom, view corresponding to Tobias’ photos. (Author: Pete Richards)
Drawings of an interpretation of t
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Fluorite
Woodleaf Quarry, Rowan County, North Carolina, USA
Crystal less than 0.5 mm
Fluorite (trisoctahedral) Don’t have a note about size, but probably crystal is less than 0.5 mm. (Author: Pete Richards)
Fluorite
Woodleaf Quarry, Rowan Co
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fluorite.jpg (Author: Pete Richards)
fluorite.jpg
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Fragments viewed immersed in index oil at 100x with a petrographic scope, polarizers not crossed (Author: Pete Richards)
Fragments viewed immersed in index
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gahnite
(Author: Pete Richards)
gahnite
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gahnite
Antsirabé, Vakinankaratra Region, Antananarivo Province, Madagascar
3 cm (Author: Pete Richards)
gahnite
Antsirabé, Vakinankar
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Hedenbergite (white) epitactic on babingtonite (black) with prehnite.
Sowerbutt Quarry, Prospect Park, New Jersey.
RPR specimen, main babingtonite crystal is 1.2 mm along front edge. (Author: Pete Richards)
Hedenbergite (whi
Sowerbutt Quarry,
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Hedenbergite and Babingtonite.jpg (Author: Pete Richards)
Hedenbergite and Babingtonite.jpg
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Hydromagnesite
Rockville, Maryland
Probably from Hunting Hill Quarry
Main crystal is 2 mm tall. (Author: Pete Richards)
Hydromagnesite
Rockville, Maryla
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Offretite epitactic on Levyne, in broken cross-section.
Beech Creek, Grant County, Oregon, USA
Specimen is about 1 cm wide. (Author: Pete Richards)
Offretite epitactic on Levyne, in
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Oligoclase "sunstone", with oriented copper inclusions
Plush, Oregon, USA
Field of view uncertain, but well less than 1 mm. (Author: Pete Richards)
Oligoclase "sunstone", w
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Osumilite
Obsidian Cliffs, North Sister Mountain, Lane County, Oregon, USA
Crystal about 1 mm across. (Author: Pete Richards)
Osumilite
Obsidian Cliffs, North S
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Phillipsite
Sugar Grove, Pendleton County, West Virginia, USA
Twinned phillipsite crystal. The crystal is 0.4 mm across the top edges. Composite of 12 images. (Author: Pete Richards)
Phillipsite
Sugar Grove, Pendleton
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Prehnite
Martin Marietta Quarry, Hickory, North Carolina, USA
Taken at 50x, field of view is 2.25 mm wide.
Prehnite (single crystals) (Author: Pete Richards)
Prehnite
Martin Marietta Quarry, H
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Prehnite single crystal 1 mm long. Virginia Crushed Stone Company Quarry, Centerville, Virginia. RPR uncataloged specimen. (Author: Pete Richards)
Prehnite single crystal 1 mm long.
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Pyrite
Sugar Grove, Pendleton County, West Virginia, USA
Pyrite bar 0.5 mm long. (Author: Pete Richards)
Pyrite
Sugar Grove, Pendleton Coun
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Pyrite and nontronite
Sugar Grove, Pendleton County, West Virginia, USA
A right-angle pyrite bar mostly coated with nontronite. The bar is 0.9 mm tall. (Author: Pete Richards)
Pyrite and nontronite
Sugar Grove,
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Pyrite, nontronite and analcime
Sugar Grove, Pendleton County, West Virginia, USA
The frontmost analcime crystal is 1 mm in diameter.
Nontronite-covered pyrite bars with analcime crystals. Composite of 9 images. (Author: Pete Richards)
Pyrite, nontronite and analcime
Su
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Pyrite, right-angle whiskers
Huron River near Milan, OH
Field of view is 5.7 mm wide (Author: Pete Richards)
Pyrite, right-ang
Huron River near
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
(Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County, Ohio, USA
1 to 2 meters (Author: Pete Richards)
Quartz (variety sandstone) and limonite
Kipton Sandstone Quarry, Kipton, Lorain County,
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Quartz, transparent and "smoky".
These crystals have very reduced prism faces.
Huron River near Milan, OH
Main crystal is 5.3 mm wide. (Author: Pete Richards)
Quartz, transpare
These crystals ha
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Salammoniac, spinel-twinned dodecahedra with cube modifications
Shale fire
Huron River near Milan, Ohio
Field of view is 0.8 mm wide.
Composite of 5 images. (Author: Pete Richards)
Salammoniac, spin
Shale fire
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Salammoniac
Shale fire
Huron River near Milan, Ohio
Field of view is 2 mm wide.
Composite of 5 images. (Author: Pete Richards)
Salammoniac
Shale fire
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Serandite twin
Poudrette Quarry, Mont-Saint Hilaire, Quebec, Canada
13 mm tall
(Author: Pete Richards)
Serandite twin
Poudrette Quarry, M
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SHAPE drawing of the franklinite crystal, showing the forms present. (Author: Pete Richards)
SHAPE drawing of the franklinite c
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Smithsonite,
Rush, Arkansas, USA
Imaged at 12x. (Author: Pete Richards)
Smithsonite,
Rush, Arkansas, USA
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Smithsonite,
Rush, Arkansas, USA
Digitally imaged at 40x. Composite of 7 stacked images. (Author: Pete Richards)
Smithsonite,
Rush, Arkansas, USA
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Spangolite.jpg (Author: Pete Richards)
Spangolite.jpg
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Sphalerite in fluorite
Bluffton Stone Co. Quarry
Bluffton, Ohio
Fluorite crystal is 0.83 mm wide. (Author: Pete Richards)
Sphalerite in flu
Bluffton Stone Co
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Spinel 1.jpg (Author: Pete Richards)
Spinel 1.jpg
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Spinel 2.jpg (Author: Pete Richards)
Spinel 2.jpg
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spinel
(Author: Pete Richards)
spinel
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Spinel
(Author: Pete Richards)
Spinel
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Spinel
(Author: Pete Richards)
Spinel
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Stacked image, original images taken at 112.5x. Crystal is about 0.5 mm. A true micromount! (Author: Pete Richards)
Stacked image, original images ta
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Sulfur, dendritic
Shale fire
Huron River near Milan, Ohio
Field of view is 3.6 mm wide. (Author: Pete Richards)
Sulfur, dendritic
Shale fire
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Thomsonite
Beech Creek, Oregon, USA
Hemisphere is about 1.5 mm across. (Author: Pete Richards)
Thomsonite
Beech Creek, Oregon, US
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Top of specimen is 5 x 6 cm. (Author: Pete Richards)
Top of specimen is 5 x 6 cm.
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Turquoise crystals(!) not quite 1 mm long. (Author: Pete Richards)
Turquoise crystals(!) not quite 1
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Unusual franklinite crystal with cube and tetrahexahedron {310} faces as well as the octahedron. Late stage growth in a vug. Crystal is 0.6 mm wide. (Author: Pete Richards)
Unusual franklinite crystal with c
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Unusually well-formed willemite crystal, of late-stage growth in a vug. Crystal group is 0.95 mm tall. (Author: Pete Richards)
Unusually well-formed willemite cr
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Zunyite
Big Bertha Mine (Veta Grande Mine), Middle Camp-Oro Fino District, Dome Rock Mountains, La Paz County, Arizona, USA
0.8 mm crystal (Author: Pete Richards)
Zunyite
Big Bertha Mine (Veta