Pseudomorphs and Casts Gallery
On this gallery, are gathered all the specimens on this website which are considered pseudomorphs. A pseudomorph is a mineral or mineral compound which is in an atypical form, which has resulted from a substitution process in which the appearance and dimensions of one mineral have been retained, but the original mineral is replaced by another. The name literally means "false form". There are essentially 3 kinds of pseudmorphs which are the following:
Substitution Pseudomorphs: In these specimens, one mineral has been completely chemically substituted by another mineral. The shape of the original mineral is retained, but color, hardness, and density are usually different (and often luster).
Alteration Pseudomorphs: In these specimens, only a partial substitution has occurred. This leads to a specimen with a layer of the new mineral with an interior of the original mineral with the shape of the original mineral.
Perimorphs: In these specimens, one mineral has been coated by another and the original has dissolved. This usually leads to a specimen with a mix of surfaces both of the new mineral and the surfaces of the dissolved mineral. A gray area is where this
dissolution is not natural. A case in point, Michigan Copper specimens are often found as casts after Calcite. In some cases, the dissolution has occurred due to acidic natural solutions but in other cases the Calcite has been purposely etched out with acid. Sometimes it is difficult to differentiate between the two.
Casts: In these specimens, a mineral has formed but it's shape has been determined by the environment in which it formed. Two examples are geodes and Michigan Copper Skulls and Amygdules.
minerals in alphabetical order by first letter only (this is the primary mineral of the specimen - the pseudomorph may be a secondary mineral)
click on the title link or photo to proceed to a specimen's page
A
B
C
6694
Calcite with Psuedomorphic Casts

Hardin Co., Illinois
Ex. A. Neely, 1960s
11.4 x 7.8 x 5 cm
$45
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6200
Calcite Crystals with Small Casts

Santa Eulalia District, Mun. de Aquiles Serdan, Chihuahua, Mexico
1970s
14.1 x 12.2 x 7.1 cm
$50
|
5906
Marcasite Included and on the Surface of Calcite Crystals, Small Casts after Unkown Crystals

Dornburg Mine, Ramsbeck, Meschede, Sauerland, North Rhine-Westphalia, Germany
Ex. Renaud Vochten, purchased in 1970
10.6 x 7.2 x 2.6 cm
$55
|
5878
Chalcocite Crystals on Massive Chaclcocite with Cast

Wheal Pendarves, Killivose, Camborne, Cornwall, England
4.4 x 3.7 x 3.3 cm
$100
|
4994
Calcite with Unidentified Pink Alteration, Chalcopyrite

Sweetwater Mine, Viburnum Trend Dist., Reynolds Co., Missouri
4.2 x 1.9 x 1.5 cm
$40
|
2243
Crinoid Stems

Bloomington,Monroe Co., Inidiana, USA
Priror to 1975
9.4 x 3.5 x 4.2 cm
$35
|
D
6108
Dolomite Pseudomorph/Epimorph after Calcite

Guanajuato, Guanajuato, Mexico
1960s
9.5 x 5.8 x 3.5 cmThe Dolomite is approximately 2 mm thick.
$70
|
6021
Datolite Crystals and Smoky Quartz with Pseudomorphic Casts after Calcite

Bor Pit (Boron Pit), Dal'negorsk B deposit, Dal'negorsk, Primorskiy Kray, Far-Eastern Region, Russia
12.2 x 7.5 x 4.7 cm
$200
|
5853
Datolite and Quartz with Casts after Calcite

Bor Pit (Boron Pit), Dal'negorsk B deposit, Dal'negorsk, Primorskiy Kray, Far-Eastern Region, Russia
10.8 x 8.5 x 4.3 cm
$600
|
F
6545
Fluorite on Quartz with Pseudomorphic Casts after Fluorite

Frazer's Hush Mine, Rookhope, Stanhope, County Durham, England
UV Fluorescent
12 x 11.2 x 5.3 cm
$250
|
6435
Multicolored Fluorite with Included Chalcopyrite, Casts after Barite

Hardin Co., Illinois
Ex. A. Neely, Wrapped in Hardin County Independent newspapers from 1963
19.3 x 13.5 x 6 cm
$200
|
5467
Fluorite on and within Quartz Pseudomorphs after Calcite Coated with Montromite

Prospectors Delight Mine (Black Knife Mine), Cuchillo Negro Dist., Sierra Cuchillo, Sierra Co., New Mexico
Ex. Wright's Rock Shop
10.8 x 7.2 x 6.5 cm
$100
|
G
H
L
M
6521
Marcasite Cast after Calcite, Galena coated with Lead and Iron Oxides

Joplin Field, Tri-State District, Jasper Co., Missouri
9.3 x 9 x 5.9 cm
$50
|
6374
Chrysocolla Pseudomoprh after Malachite, Micro Crystals of Dioptase

Bonanza Mine (Harquahala Mine), Martin Peak, Salome, Little Harquahala Dist., Little Harquahala Mts, La Paz Co., Arizona
Ex. Steve Pullman, Ex. Fraziers
9.9 x 7 x 5.6 cmlabeled as Bisbeeite
$45
|
5920
Malachite and Malachite Pseudomorh after Azurite

Bisbee, Warren District, Mule Mts, Cochise Co., Arizona
4.8 x 3.8 x 3.9 cm
$35
|
5027
Malachite on Quartz with Casts after Calcite, Minor Chalcopyrite

Mina El Cobre, Zacatecas, Mexico
Ex. Robert Gannon
7.8 x 6.3 x 4.2 cm
$45
|
4629
Malachite Pseudomorph after Azurite

Tsumeb, Namibia
5.2 x 2.8 x 1.6 cm
$150
|
2062
Mimetite on Goethite pseudomorphs after Calcite

Megala Pefka Mine No. 28, Lavrion (Laurion; Laurium) District, Attiki (Attica) Prefecture, Greece
Ex. Steve Pullman
6.2 x 6 x 1.5 cm
$50
|
P
6681
Prehnite Pseudomorphs after Anhydrite, Stilbite, Calcite

Paterson, Passaic Co., New Jersey
Ex. E. Morales from ALW Collections, 1996
4.8 x 4 x 3.6 cm
$30
|
6637
Mimetite on Plumbogummite Partially Pseudomorph after Pyromorphite

Dry Gill Mine, Caldbeck Fells, Allerdale, Cumbria, England
PbAl3(PO4)(PO3OH)(OH)6
Ex. J. George Wilson
4.4 x 3 x 2.9 cm
SOLD
|
5087
Plumbogummite Pseduomorph after Pyromorphite

Yangshuo Mine, Yangshuo Co., Guilin Pref., Guangxi Zhuang Autonomous Region, China
UV Fluorescent
PbAl3(PO4)(PO3OH)(OH)6
6.5 x 4.3 x 3.4 cm
$150
|
5044
Pyromorphite Pseudomorph after Cerussute

Higher Roughton Gill (Balliway Rigg), Roughton Gill, Caldbeck Fells, Cumbria, England
5.6 x 4.3 x 3.8 cm
$150
|
4104
Polished Petrified Wood (Chalcedony / Quartz)

Blue Forest, Eden Valley, Sweetwater Co., Wyoming
Pre 1975
10.4 x 7.3 x 1.1 cm
$25
|
1663
Petrified Wood

Montana
10.5 x 8.4 x 3.8 cm
$15
|
338
Pyrite pseudomorph after Pyrrhotite

Zacatecas, Mexico
8 x 5.7 x 4 cm
$50
|
|
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Q
6481
Quartz Pseudomorph after Aragonite

Rancho Coyamito, Sierra del Gallego, Ahumada Municipality, Chihuahua, Mexico
Ex. E. Morales from Mineral and Fossil Gallery, Munich Show, 1983
4.9 x 5.4 x 4.1 cm
$75
|
6353
Quartz Pseuodomorph after Anhydrite

Danialo Mine, Sao Gabriel, Rio Grande do Sul, Brazil
Ex. E. Morales, purchased from Aurora Minerals, New York Show, Nov. 1981
6.1 x 3.8 x 3.3 cm
$75
|
6105
Quartz Pseudomorph/Epimorph after Hemimorphite

Mapimi, Durango, Mexico
1970s
12.6 x 9.6 x 4.7 cm
$100
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5977
Hematite Pseudomorph after Epidote with Quartz

Bessemer Claim, Bessemer Ridge, Green Mountain, North Bend, King Co., Washington
Ex. Steve Pullman, Ex. David Shannon
6.8 x 3.8 x 2 cm
$50
|
5915
Quartz Epimorph after Fluorite

Silverton, San Juan Co., Colorado
from Rock & Minerals Denver Auction, Ex. George Witters
11.1 x 6.8 x 4.2 cm
$100
|
5490
Smoky Quartz Pseudomorph

Bor Pit (Boron Pit), Dal'negorsk B deposit, Dal'negorsk, Primorskiy Kray, Far-Eastern Region, Russia
7.8 x 4 x 2.8 cm
$150
|
5263
Smoky Quartz, Hematite, Copper Stained Chalcedony with Pseudomophs and Casts

Mexico (likely Concepcio del Oro, Zacatecas, Mexico)
Ex. Robert Gannon
6.5 x 5.8 x 6.4 cmUprght crystal measures 4.5 cm tall.
$75
|
5064
Quartz and Hematite Pseudomorph after Epidote

Bessemer Claim, Bessemer Ridge, Green Mountain, North Bend, King Co., Washington
Ex. Steve Pullman
7.7 x 3.8 x 2.2 cm
$50
|
3111
Quartz Pseudomorph after Poker Chip Calcite

Guanajuato, Mexico
14 x 12.6 x 7.3 cm
$75
|
S
6629
Stibconite Pseudomorph after Stibnite

Estacion Wadley, Municipio de Catorce, San Luis Potosi, Mexico
15 x 12.5 x 11 cm
SOLD
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6531
Smithsonite Pseudomorh after Calcite

Mina San Antonio, East Camp, Santa Eulalia Dist., Mun. de Aquiles Serdan, Chihuahua, Mexico
7.6 x 6 x 4.2 cm
$75
|
6244
Siderite Pseudomorph after Calcite

Santa Eulalia District, Mun. de Aquiles Serdan, Chihuahua, Mexico
Ex. E. Morales, purchased at Tucson Show, 1983
9.5 x 7.1 x 4.6 cm
$75
|
4408
Smoky Quartz with Included Hematite, Goethite Pseudomorphs after Siderite, Microcline

Teller Co., Colorado
15.8 x 6.6 x 4.6 cm
$85
|
4356
Sphalerite variety Ruby Jack, Calcite casts

Cleator Moor Iron Mines, Cleator Moor, West Cumberland Iron Field, Cumbria, England
Ex. H. R. McBroom, from Sam Weller, 1985
6.4 x 5.2 x 4.1 cm
$100
|
|
T
U
4349
Uralite, Epidote

Calumet Mine, Turret District, Chaffee Co., Colorado, USA
7.8 x 6.5 x 4.5 cmEpidote XL is 2.7 long and 1.1 cm in width
$40
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3339
Uralite and Epidote with Calcite

Calumet Mine, Turret District, Chaffee Co., Colorado, USA
11.5 x 7.5 x 5.5 cmLargest XL 7 x 3 x 1 mm
$30
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W
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