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Pseudomorphs are mineral specimens that have the external shape of one mineral but are composed of another. The pseudomorph goethite after marcasite forms when marcasite is exposed to oxidizing conditions and starts to oxidize and break down. As the marcasite breaks down, goethite replaces it in the crystal structure, preserving the shape of the original marcasite crystal. The resulting specimen appears as a marcasite crystal, but is actually composed of goethite.
The Farafra Oasis, in the White Desert, has been known for a number of years to deliver incredible pseudomorph specimens. The pseudomorphs occur within the Cretaceous Khoman Chalk, from which the White Desert derives its name.
These specimens are remarkable for their relatively sharp marcasite crystal forms in aesthetic crystal clusters. They are in excellent condition. This collector's specimen is unique, of great quality and ready for display.
Name: Goethite After Marcasite Pseudomorph
Specimen Size: Miniature-Sized
Dimensions: 43x40x33 mm / 1.7x1.6x1.3 inches
Weight: 66.7 grams / 203 ounces
Origin: Found in White Desert, Farafra Oasis, Egypt
The well defined metallic lustre of the crystals makes this specimen of botryoidal hematite beautiful and unique. This specimen is in very good condition. Would be a beautiful addition to any new or existing collection.
Name Hematite Crystal
Specimen Size: Miniature-Sized
Dimensions: 46x31x18 mm / 1.8x1.2x0.7 inches
Weight: 45 Grams / 1.6 oz
Origin: Irhoud Mine, Youssoufia Province, Marrakesh-Safi Region, Morocco
This is a beautiful combination of Calcite and Stilbite on Apophyllite crystal cluster.
Calcite is found throughout the world in sedimentary, metamorphic, and igneous rocks. Some geologists consider it to be a "ubiquitous mineral" - one that is found everywhere. Calcite is the principal constituent of limestone and marble. Stilbite is perhaps the most popular zeolite mineral for collectors. Stilbite is a handsome specimen with its pearly luster and sometimes colorful pink tints. Apophyllite is transparent to translucent and is commonly found in colorless or white varieties, although it can also occur in shades of green, pink, yellow, or brown.
This nice crystal specimen would be a beautiful addition to any new or existing collection.
Name: Calcite, Stilbite and Apophyllite cluster
Specimen Size: Cabinet-Sized
Dimensions: 62x59x46 mm / 2.4x2.3x1.8 inches
Weight: 185 grams / 6.5 ounces
Origin: Mined in Jalgaon, India
This is an excellent specimen of Zircon from the world renowned location that is Mount-Saint Hilaire. This beautiful crystal would be a great addition to any new or existing collection.
Name: Zircon on Analcime
Specimen Size: Miniature-Sized
Dimensions: 54x42x41 mm / 2.1x1.6x1.6 inches
Weight: 76.7 Grams / 2.7 Ounces
Origin: Mined in Mont-Saint-Hilaire, Québec, Canada
We have for you a small floater crystal of gypsum var Selenite in a perky box found 1962 in Ellsworth Mahoning County, Ohio U.S.A..
Gypsum is one of the more common minerals in sedimentary environments. It is a major rock forming mineral that produces massive beds, usually from precipitation out of highly saline waters. Since it forms easily from saline water, gypsum can have many inclusions of other minerals and even trapped bubbles of air and water.
This specimen has no damage and will ship in its protective display box.
Name: Gypsum var. Selenite
Specimen Size: Thumbnail-Sized
Dimensions: Specimen 20x10x7 mm / 0.8x0.4x0.3 inches
Box 35x33x34 mm / 1.4x1.3x1.3 inches
Weight: 10.9 grams / 0.4 oz (incl box)
Origin: Ellsworth, Mahoning County, Ohio USA
Pseudomorphs are mineral specimens that have the external shape of one mineral but are composed of another. The pseudomorph goethite after marcasite forms when marcasite is exposed to oxidizing conditions and starts to oxidize and break down. As the marcasite breaks down, goethite replaces it in the crystal structure, preserving the shape of the original marcasite crystal. The resulting specimen appears as a marcasite crystal, but is actually composed of goethite.
The Farafra Oasis, in the White Desert, has been known for a number of years to deliver incredible pseudomorph specimens. The pseudomorphs occur within the Cretaceous Khoman Chalk, from which the White Desert derives its name.
These specimens are remarkable for their relatively sharp marcasite crystal forms in aesthetic crystal clusters. They are in excellent condition. This collector's specimen is unique, of great quality and ready for display.
Name: Goethite After Marcasite Pseudomorph
Specimen Size: Miniature-Sized
Dimensions: 42x39x28 mm / 1.6x1.5x1.1 inches
Weight: 45.8 grams / 1.6 ounces
Origin: Found in White Desert, Farafra Oasis, Egypt
This Analcime specimen comes from the Poudrette Quarry at Mount-Saint-Hilaire and displays a nice terminated crystal. The specimen also has some small intersecting black aegirine crystals.
Great looking translucent, colorless analcime crystal. An excellent specimen from the world renowned location that is MSH. This beautiful crystal would be a great addition to any new or existing collection.
Name: Analcime
Specimen Size: Thumbnail-Sized
Dimensions: Specimen 18x19 mm / 1.2x1.0 inches
Specimen Box 33x33 mm / 1.3x1.3 inches
Weight: 7.25 Grams / 0.2 Ounces
Origin: Mined in Poudrette Quarry, Mont-Saint-Hilaire, Québec, Canada
An olivine volcanic bomb is a type of volcanic rock that contains olivine crystals and has been ejected during a volcanic eruption. Olivine is a mineral that is commonly found in the Earth's mantle and is one of the first minerals to crystallize as magma cools.
Volcanic bombs are large clots of lava that are ejected from a volcano during an explosive eruption. They can vary in size, and their shapes are often streamlined due to their molten nature as they are thrown through the air. When these volcanic bombs contain olivine crystals, they are referred to as olivine volcanic bombs.
The crystal face has been cut and polished to show the red and green olivine crystals which are showcased beautifully against the surrounding lava crust. This museum grade specimen would be a beautiful addition to any new or existing collection. Comes with a Canagem Collection specimen card.
Name: Red Olivine Crystal Bomb
Specimen Size: Large Cabinet-Sized
Dimensions: 110x91x51 mm / 4.3x3.6x 2.0 Inches
Weight: 768.7 Grams / 1 Lb 11 Ounces
Details: Volcanic activity Mortlake, Victoria, Australia
The colorful apatite crystals are visible throughout this calcite vein with multiple small crystal being terminated. It has a nice luster and lovely colored hues with apatite in green, greenish blue and rare grey white. Would be a beautiful addition to any new or existing collection.
Name: Calcite vein with green, greenish blue and rare grey white Apatite crystal
Specimen Size: Large Cabinet-Sized
Dimensions: 110x73x79 mm / 4.3x2.9x3.1 inches
Weight: 662 Gr / 1 lbs 7 oz
Origin: Eastern Ontario, Canada
These are whole, uncut lava coated volcanic bombs from Mortlake, Victoria, Australia . The lava crust on these pieces is complete, they can be showcased as is or cut to show the interior. The lava is most likely covering green olivine crystals.
An olivine volcanic bomb is a type of volcanic rock that contains olivine crystals and has been ejected during a volcanic eruption. Olivine is a mineral that is commonly found in the Earth's mantle and is one of the first minerals to crystallize as magma cools.
Volcanic bombs are large clots of lava that are ejected from a volcano during an explosive eruption. They can vary in size, and their shapes are often streamlined due to their molten nature as they are thrown through the air. When these volcanic bombs contain olivine crystals, they are referred to as olivine volcanic bombs.
The dimensions and weight of each of these olivine bombs are as follows:
A. 32x25x17 mm / 1.3x1.0x0.7 in | 14.2 gr / 0.5 oz
B. 37x25x22 mm / 1.5x1.0x0.9 in | 23 gr / 0.8 oz
C. 43x34x21 mm / 1.7x1.3x0.8 in | 37 gr / 1.3 oz
D. 49x44x34 mm / 1.9x1.7x1.3 in | 63.6 gr / 2.2 oz
E. 66x44x33 mm / 2.6x1.7x1.3 in | 113.5 gr / 4.0 oz
F. 79x48x38 mm / 3.1x1.9x1.5 in | 145.4gr / 5.1 oz
Any of these Olivine Bombs would be a beautiful addition to any new or existing collection. Comes with a Canagem Collection specimen card.
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