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Pseudomorphs! November 10, 2021 · 25 specimens Presented is a gallery of nothing but pseudomorphs. Pseudomorphs are specimens in which one mineral is replaced by another. The shape of the original mineral remains unchanged, however properties such as color, hardness, and chemistry change to those of the replacing mineral. |
C254 - Malachite after Azurite sold
Sacramento Mine, Bisbee, Arizona, USA
Thumbnail - 2.5 x 2 x 1.5 cm
Pair of well fomred, crossing pseudomorphs of Malachite after Azurite. Fine quality undamaged thumbnail.
C385 - Stibiconite after Stibnite $150 available
San Luis Potosi, Mexico
Small Cabinet - 5.7 x 2.7 x 2.5 cm
Stibiconite after Stibnite specimen with sharp form and a steep pyramidal termination. This is a Mexican classic and a complete replacement of the former Stibnite (not just a surface coating) as can be seen on the bottom of the crystal. Complete and undamaged.
CO107 - Malachite after Cuprite sold
Nchanga Mine, Chingola, Zambia
Thumbnail - 1.9 x 1.7 x 1.5 cm
Intergrown octahedral Malachite after Cuprite crystals from a 1979 find in Zambia, just released for the first time. Complete and undamaged except for one micro chip on one corner.
CT270 - Chrysocolla after Malachite after Azurite with Wulfenite sold
Whim Creek, Western Australia, Australia
Small Cabinet - 7 x 5.5 x 4 cm
A 3.2cm crystal of the double pseudomorph of Chrysocolla that has replaced a crystal of Malachite after Azurite. Scattered crystals of orange Wulfenite are present on the matrix.
CT306 - Sulfur after Selenite sold
Silver Peak, Esmeralda Co., Nevada, USA
Thumbnail - 3 x 1.5 x 0.8 cm
Rare and unusual pseudomorph of Sulfur that ahs replaced a well formed, terminated Selenite crystal. Ex. Chuck Trantham collection.
CT336 - Azurite, Malachte after Azurite sold
Tsumeb, Namibia
Small Cabinet - 6.5 x 4 x 3.5 cm
Sharp crystals of blue Azurite intermixed with green crystals of Malachite after Azurite pseudomorphs on a light matrix with additional yellow/green mineralization. Undamaged crystals with pseudomorphs that reach 2.2cm, some of which are double-terminated.
CT512 - Achtaragdite $120 available
Akhtaragda River mouth, Vilyui River Basin, Mirninsky District, Sakha Republic (Yakutia), Russia
Thumbnail - 1.5 x 1.3 x 1.2 cm
Achtaragdite is a rare pseudomorph of a hydrogrossular-chlorite-carbonate mineral after what is believed to be Helvite. This is a little understood psuedo likely found many decades ago at the type locality for Grossular garnet in Siberia. It is a fine example with a well formed tetrahedron of the form of the former Helvite crystal.
D469 - Chalcocite, Malachite after Azurite, Malachite sold
Ajo, Pima Co., Arizona, USA
Thumbnail - 3 x 1.8 x 1.3 cm
Unusual composite specimen of a Chalcocite crystal with a 'veneer' on the front face of Malachite after Azurite. A spray of fibrous Malachite extends off the right side.
J254 - Orthoclase after Quartz $350 available
Krupka, Erzgebirge Mtns., Czech Republic
Small Cabinet - 8 x 4 x 3 cm
Rare pseudomorph of Orthoclase after Quartz. Orthoclase hosting the 3cm pseudomorph at one end, mostly the termination of the former Quartz crystal. Collected in the 1970s, this is one of only a small number of specimens known.
J261 - Realgar and Orpiment replacing fossil coral sold
Gold Bar Mine, Eureka Co., Nevada, USA
Small Cabinet - 8 x 6.5 x 1.5 cm
Specimen of Realgar and Orpiment that has replaced fossilized coral. Sawcut on front face to show the coral structure.
J275 - Topaz after Augelite with Quartz $750 available
Mundo Nuevo Mine, La Libertad, Peru
Miniature - 5 x 3 x 3 cm
Two light lavender casts of Topaz after Augelite associated with elongated, transparent Quartz crystals. This was fouond about ten years ago when the great Augelite finds were made. There are two casts present, the largest over 2cm. This is the best of only a few I saw available. They were originally thought to be Fluorite after Augelite, but have been tested and confirmed to be Topaz.
J277 - Chalcedony after Fluorite sold
Trestia, Maramures, Romania
Small Cabinet - 6 x 4 x 3 cm
Classic old specimen of translucent blue Chalcedony that has repalced cubic Fluorite. Lustrous undamaged crystals. Comes with an old Julius Bohm label.
LL156 - Azurite, Malachite after Azurite $3,500 available
Tsumeb, Namibia
Cabinet - 11 x 6.5 x 6.5 cm
Cluster of prismatic Azurite and Malachite after Azurite crystals with Arsentsumebite and Cerussite. I just the love the highly colorful specimens from this mine and this is a prime example of such a specimen. A very colorful mixture of blue, deep green Malachite, lighter green Arsentsumebite, and small crystals of Cerussite scattered about. Comes with an old Phil Scalisi label.
LL172 - Malachite after Azurite sold
Ajo, Pima Co., Arizona, USA
Miniature - 5 x 4.5 x 2.5 cm
Wreath-like formation of Malachite pseudomorphs after Azurite. Large, blocky undamaged crystals. A floater covered by velvety Malachite all around.
LL331 - Limonite after Pyrite $75 available
Pelican Point, Utah Co., Utah, USA
Thumbnail - 2.2 x 2 x 2 cm
Fine quality, complete pseudomorph of Limonite after Pyrite. Striations on the surface from the original Pyrite are evident. From the Judy & Chris Cook pseudomorph collection.
LL452 - Azurite with Chrysocolla after Libethenite sold
Burra Burra Copper Mine, Mt Lofty Ranges, South Australia, Australia
Miniature - 4.5 x 3 x 2 cm
Platy, electric blue crystals of Azurite with pseudomorphs of Chysocolla after Libethenite. Colorful and unusual Azurite specimen.
LL937 - Azurite, Malachite after Azurite sold
Chessy, Rhone-Alpes, France
Small Cabinet - 8.5 x 6 x 5 cm
Deep blue Azurite and green Malachite after Azurite crystals from Chessy. This is a good sized specimen for the locality with great crystals all over, including a bridge of crystals. Comes with old Harvard Mineral Museum labels that dates the specimen back to at least 1976, but specimens have been found here since the 1800s and this could be significantly old than that. An excellent Chessy Azurite.
M431 - Copper after Azurite sold
Copper Rose Mine, Santa Rita, New Mexico, USA
Miniature - 4 x 3.5 x 3 cm
Floater cluster of Copper with large, very well formed crystals. This is a replacement of Copper after an Azurite cluster and has unusually well separated, distinct crystals.
M462 - Pyrite after Pyrhottite sold
Zacatecas, Mexico
Miniature - 4.7 x 3.5 x 2.5 cm
Thin blades of Pyrite that have pseudomorphed after Pyrhottite crystals. Bright and lustrous with a few small Quartz crystals associated.
M463 - Bixbyite on Hematite after Garnet sold
Maynard Claim, Thomas Range, Juab Co., Utah, USA
Thumbnail - 2.1 x 1.2 x 0.8 cm
Interconnected cluster of Hematite pseudomorphs after garnet, all sprinkled with lustrous black cubes of Bixbyite. Undamaged quality thumbnail.
M731 - Prehnite, Stilbite on Laumontite after Anhydrite $150 available
Prospect Park, New Jersey, USA
Miniature - 4.8 x 4 x 3.5 cm
Green Prehnite and tan Stilbite crystals on a cluster of Laumontite after Anhydrite crystals. Small Calcite crystals are also present. Well crystallized all around.
MM100 - Malachite after Azurite sold
Milpillas Mine, Cuitaca, Sonora, Mexico
Small Cabinet - 7 x 6 x 4 cm
Well formed crystals of Malachite after Azurite with a velvety surface luster. Individual crystals to 2.5cm. Highly sculptural and undamaged.
ST272 - Kolwezite/Malachite Pseudomorphs sold
Kolwezi Mining District, Lualaba, DR Congo
Small Cabinet - 8.5 x 4.5 x 2.5 cm
Dark green specimen of Kolwezite and/or Malachite that has pseudomorphed after Barite (?). Nothing but interconnected bladed crystals without matrix. Kolwezite is a Copper Cobalt Carbonate Hydroxide and this is the type locality for the species. private_notes
ST809 - Tennantite after Azurite $380 available
Tsumeb, Namibia
Small Cabinet - 6 x 4 x 2 cm
Crystal cluster of Tennanite after Azurite from Tsumeb. Elongated, primatic crystals of former Azurite that have been pseudomorphed to Tennantite. An undamaged floater cluster with individual crystals to 4.5cm in length.
ST936 - Cuprian Adamite, Rosasite, Smithsonite, Malachite on Calcite casts sold
Christiana Mine, Laurion, Attica, Greece
Small Cabinet - 8.5 x 4.5 x 4 cm
One of a kind specimen composed of casts of scalenohedral Calcite crystals that are coated with Cuprian Adamite, Rosasite, Malachite, and colorless Smithsonite. This specimen has the desired qualities of being aesthetic, colorful, mineralogically interesting, and rare. There are a couple old collection numbers affixed to the bottom. Rare and unusual!!!