20129 VHD1 Millerite, Chalcopyrite, Halls Gap, Lincoln County, Kentucky, USA
Fine hair-like millerite with a chalcopyrite crystal. Width of view 9mm. Stack of 150 images. Click on the image below for a higher resolution version.
United States
ncat RAM4 CW38 5123 Realgar, Stibnite, Orpiment, Sulphur, Quartz, Getchell Mine, Adam Peak, Potosi Mining District, Osgood Mountains, Humboldt County, Nevada, USA
Red realgar with orange orpiment, silver stibnite, pale yellow sulphur, tiny colourless quartz crystals, and some unknowns. Ex Charles Willett Collection. Width of view 6mm. Stack of 100 images. Click on the image below for a higher resolution version.
ncat RAM4 CW63 Wavellite (or Fluorwavellite), Variscite, Wood Mine, Del Rio Mining District, Cocke County, Tennessee, USA
Colourless-white radiating sprays of wavellite (or fluorwavellite) with pale pink (ferrian) variscite crystals. The paper describing fluorwavellite states that all specimens analysed were fluorwavellite, but that does not guarantee that wavellite doesn’t occur. Without analysis, you just don’t know as both species are visually indistinguishable. Ex Charles Willett Collection. Joint...
ncat RAM4 CW62 4841 Vivianite, Wheeler Road, Oxon Hill, Prince Georges County, Maryland, USA
Dark blue vivianite crystals in cavities in a nodule, with the matrix showing cracks due to dehydration. Ex Charles Willett Collection. Width of view 6mm. Stack of 75 images. Click on the image below for a higher resolution version.
ncat RAM4 CW49 8538, Spessartine, Quartz, Ruby Mountain, Nathrop, Chaffee County, Colorado, USA
Well-formed orange crystals on colourless quartz crystals. The matrix fluoresces pink under shortwave ultraviolet light. Ex Charles Willett Collection. Width of view 6mm. Stack of 95 images. Click on the image below for a higher resolution version.
1928 Spessartine, Ruby Mountain, Nathrop, Chaffee County, Colorado, USA
A single dark red spessartine. Ex Mark Hallam Collection. Probably collected by Ted Johnson. Width of view 6mm. Stack of 65 images. Click on the image below for a higher resolution version.
2677 Vanadinite, Upper Level, Gray Horse Mine, Dripping Spring Mountains, Gila Co., Arizona, USA
Red hexagonal prisms of vanadinite. One crystal shows two interesting features. One is that it is partly hollow. The other is that only three adjacent sides of the hexagon have prism faces. The other three sides join up with the pinacoid on the top of the crystal. There is botryoidal...
ncat JP1758 Descloizite, Vanadinite, Grey Horse Mine, Riverside, Riverside District, Dripping Spring Mts, Pinal Co., Arizona, USA
Dark brown descloizite on a bed of orange vanadinite. Lustrous yellow hexagonal vanadinite (or possibly mimetite?) in a small vugh on the side. Ex Jo Price Collection. Descloizite photo: Width of view 6mm. Stack of 90 images. Yellow vanadinite photo: Width of view 3mm. Stack of 35 images. Click on...
ncat JP1695 Vanadinite, Descloizite, Mimetite, Grey Horse Mine, Riverside, Riverside District, Dripping Spring Mts, Pinal Co., Arizona, USA
Orange colour-zoned hexagonal vanadinite with brown to greenish-black descloizite, and tiny white needles of mimetite. The vanadinite is interesting, with some hollow crystals, and others that look like they have been etched away or resorbed. The latter occurs almost exclusively on the descloizite. Ex Jo Price Collection. Width of view...
ncat TI Descloizite, Calcite, Grey Horse Mine, Riverside, Riverside Mining District, Dripping Spring Mountains, Pinal Co., Arizona, USA
Colourless calcite crystals that fluoresce pale pink under shortwave UV, with dark brown descloizite crystals. An interesting specimen. There appears to be multiple generations of calcite. The “Mercedes” faces are obviously a later addition, and there is zoning apparent in the fluorescence. White light photo: Width of view 6mm, stack...
ncat SMLN Celestite, Clay Center, Allen Township, Ottawa County, Ohio, USA
Three colours of celestite. Blue-grey main crystals with white fibrous-like outer surface, and small colourless crystals attached. Width of view 9mm. Stack of 65 images. Click on the image below for a higher resolution version.
1035 Celestite, White Rock Quarry, Clay Center, Allen Township, Ottawa County, Ohio, USA
Colourless crystals of celestite. Predates Stoneco (1995) so just “White Rock Quarry”. Acquired from Ian Graham in 1993. Collected by an unknown person some time before that. Width of view 9mm. Stack of 65 images. Click on the image below for a higher resolution version. Below: Original labels.