Alan Barnes (2)'s Photo Gallery
R72-W3UPerovskite CaTiO3
Dimensions: 58 mm x 38 mm x 33 mm
Field of View: 24 mm
Largest Crystal Size: 14 mm
Stacked from 89 images. Photograph taken using Canon EOS 80D and stacked using Stackshot rail and controller. Stacking done using Helicon Focus 7.
Weathered specimen full of mostly well-formed, blackish crystals of perovskite. Specimen size is 5.8x3.8x3.3cm at the widest points. The largest crystal measures 1.4x1.4x0.7cm (last measurement is the height of the crystal and was taken from the equatorial plane to the termination). All of the perovskite crystals on the specimen show flattened terminations. The white coating on the crystals is soluble in dilute acid and is therefore presumed to be calcite. Minor amounts of 'limonite' formed from the weathering process are also scattered around the specimen. Specimen in the Alan Barnes Collection #2317 and formerly in the Jim Knight Collection #3078.
NM3-G03Gold Au
Dimensions: 23 mm x 14 mm x 5 mm
Field of View: 25.1 mm
Weight: 4.0 g
Gold nugget measuring 2.3 x 1.4 x 0.5cm at the widest points and weighing 4 grams. Alan Barnes photograph and Collection #2224
RXT-GNMPyrrhotite Fe1-xS , Calcite CaCO3 , Erythrite Co3(AsO4)2·8H2O
Dimensions: 5.8 cm x 6.9 cm x 5.8 cm
Field of View: 1.9 cm
Largest Crystal Size: 1.5 cm
Single crystal of mostly-exposed, partially corroded pyrrhotite measuring 11mm across the uppermost edge and 15mm across the visible widest point of the crystal and with a thickness of 4mm. Associated with the pyrrhotite crystals is a large number of white, poorly formed crystals of calcite and very minor amounts of erythrite (visible in the top right of the photograph). Alan Barnes Collection and photograph.
9PY-Y5FParasymplesite Fe2+3(AsO4)2·8H2O , Quartz SiO2
Dimensions: 1.9 cm x 1.4 cm x 1.2 cm
Field of View: 3.5 mm
Largest Crystal Size: 2 mm
A thumbnail specimen comprising a 2mm, tightly packed aggregate of greenish black, bladed, microscopic crystals of parasymplesite sat on the termination of a small, but well-formed quartz crystal. Quite a nice, if small, example of this species from one of only two known localities for it in the UK
R2D-50PAstrocyanite-(Ce) Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2·1.5H2O , Kamotoite-(Y) Y2(UO2)4(CO3)3O4·14H2O
Dimensions: 5.7 cm x 3.8 cm x 2.8 cm
Field of View: 4.3 mm
Largest Crystal Size: 0.40 mm
Small, pale blue, stellate aggregates of astrocyanite-(Ce) to 0.8mm associated with yellow bladed crystals of kamotoite-(Y) on a matrix comprised entirely of earthy black uraninite. Also on the specimen, but not shown in the photograph, are several microscopic pearly white, bladed crystals of shabaite-(Nd). Magnification approximately X15. Photo taken using Canon EOS 80D with Canon 55-250mm lens extended using Jessop 13mm and 31mm extension tubes.
Alan Barnes Collection and photo
ATA-3NVYeomanite Pb2O(OH)Cl , Calcite CaCO3
Dimensions: 41 mm x 17 mm x 17 mm
Field of View: 5 mm
Largest Crystal Size: 3 mm
An aggregate of white bladed crystals of yeomanite along with a small, upstanding aggregate of yeomanite sitting on a bed of colourless calcite crystals that, in turn, sit on an earthy black manganese oxide matrix. A second, much smaller aggregate shows a divergent spray of yeomanite crystals that bridge the gap between a slightly larger aggregate of yeomanite crystals measuring 8x4mm that are partially overgrown by a thin, colourless crust of calcite. Alan Barnes collection and photograph.
N5G-F29Somersetite Pb8O2(OH)2(CO3)5 , Hydrocerussite Pb3(CO3)2(OH)2 , Plumbonacrite Pb5O(OH)2(CO3)3
Dimensions: 36 mm x 22 mm x 22 mm
Field of View: 21 mm
Largest Crystal Size: 12 mm
Stacked aggregate of minty green hexagonal platy crystals of somersetite some with whiteish inclusions of plumbonacrite sitting on a stack of white hydrocerussite crystals. Some of the crystals in the centre of the photo clearly show the hexagonal structure. The somersetite aggregate measures 10 x 9 x 5mm at the widest points (hydrocerussite not included in this measurement). Close to the top of the somersetite aggregate are two microscopic orange-yellow granular crystals of an unidentified mineral. Photo taken using 136 images stacked using Helicon Focus Pro and using a Canon EOS 80D camera with Canon 55-250mm lens. Specimen as a whole measures 36 x 22 x 22mm. Alan Barnes collection and photograph.
EKM-T16Whiteite-(CaFeMg) {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2·8H2O , Lazulite MgAl2(PO4)2(OH)2 , Quartz SiO2
Dimensions: 2.8 cm x 1.4 cm x 1.9 cm
Largest Crystal Size: 1.2 cm
Thumbnail specimen of tan coloured crystals of whiteite-(CaFeMg)in association with abundant blue lazulite on a matrix of colourless to white quartz. Photograph taken in natural daylight. Specimen dimensions are 2.8x1.4x1.9cm and the largest crystal measures 1.2cm along the x-axis. Alan Barnes specimen and photograph
9UW-H1VHilarionite Fe3+2(SO4)(AsO4)(OH)·6H2O
Dimensions: 25 mm x 13 mm x 6 mm
Field of View: 30 mm
Largest Crystal Size: 1 mm
Pale greenish yellow crudely globular aggregates of hilarionite to approximately 1mm on a 'limonite' rich matrix. Photograph taken in natural light as a single photograph with Sony alpha 290 camera. Specimen dimensions are 25x13x6mm
N5K-D37Ellingsenite Na5Ca6Si18O38(OH)13·6H2O , Aegirine NaFe3+Si2O6 , Villiaumite NaF
Dimensions: 42 mm x 35 mm x 30 mm
Field of View: 3 mm
Largest Crystal Size: 0.2 mm
Aggregates of white ellingsenite associated with aegirine and villiaumite. Photo is stacked image of 42 photographs taken using Nikon Coolpix 950 coupled to a Leica GZ4 microscope and the images stacked using Combine ZP. No other equipment used. Specimen dimensions are 42x35x30mm with individual crystal sizes of about 0.2um.
