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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. 2024-04-18 04:24:00 (PDT): Warning: Cannot modify header information - headers already sent by (output started at /mnt/vol-01b7ce02a4fa81bb8/data/mm/www.marinmineral.com/navbar.php:403): /mnt/vol-01b7ce02a4fa81bb8/data/mm/www.marinmineral.com/s_present.php: line 39
LL331 - Limonite after Pyrite $ 75 (=~ AUS$ 114) 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.
M462 - Pyrite after Pyrhottite $ 150 (=~ AUS$ 229) 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.
M731 - Prehnite, Stilbite on Laumontite after Anhydrite $ 150 (=~ AUS$ 229) 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.
D469 - Chalcocite, Malachite after Azurite, Malachite $ 175 (=~ AUS$ 267) 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.
CT270 - Chrysocolla after Malachite after Azurite with Wulfenite $ 600 (=~ AUS$ 915) 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.
CT336 - Azurite, Malachte after Azurite $ 300 (=~ AUS$ 457) 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 (=~ AUS$ 183) 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.
CT306 - Sulfur after Selenite $ 200 (=~ AUS$ 305) 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.
LL156 - Azurite, Malachite after Azurite $ 3500 (=~ AUS$ 5337) 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 $ 350 (=~ AUS$ 534) 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.
M463 - Bixbyite on Hematite after Garnet $ 140 (=~ AUS$ 213) 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.
LL452 - Azurite with Chrysocolla after Libethenite $ 280 (=~ AUS$ 427) 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 $ 2500 (=~ AUS$ 3812) 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.
ST272 - Kolwezite/Malachite Pseudomorphs $ 250 (=~ AUS$ 381) 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 (=~ AUS$ 579) 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.
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