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The smoky-brown color of this beautiful calcite cluster is a result of trace impurities or microscopic inclusions incorporated during crystal growth. Iron, manganese, or tiny mineral inclusions can impart shades ranging from pale champagne to deep smoky brown.
Donghai Mine, Jiangsu Province, China, is located within the Sulu ultrahigh-pressure metamorphic belt, one of the world's most geologically significant regions. Formed during the collision of two ancient continental plates hundreds of millions of years ago, the area contains rocks that were buried deep within the Earth before being uplifted to the surface. Later hydrothermal activity deposited mineral-rich veins throughout the region, creating exceptional crystals of quartz, fluorite, calcite, and other minerals.
Today, Donghai is internationally recognized as one of China's premier mineral-producing districts. In addition to quartz, the district is well known for its beautifully crystallized fluorite and calcite, valued for their vibrant colors, transparency, and excellent crystal form. Specimens from Donghai are prized not only for their beauty but also for the remarkable geological history they represent.
Name: Smoky Calcite Cluster
Specimen Size: Large Cabinet-Sized
Dimensions: 235x150x100 mm / 9.3x5.9x3.9 inches
Weight: 1.885 Kg / 4.15 pounds
Location: Donghai Mine Jiangsu Province, China
This a beautiful green Fluorite cluster from China's Donghai Mine in Jiangsu Province - a location that's well known for producing stunning fluorite with exceptional clarity and a vibrant green colour.
Donghai Mine, Jiangsu Province, China, is located within the Sulu ultrahigh-pressure metamorphic belt, one of the world's most geologically significant regions. Formed during the collision of two ancient continental plates hundreds of millions of years ago, the area contains rocks that were buried deep within the Earth before being uplifted to the surface. Later hydrothermal activity deposited mineral-rich veins throughout the region, creating exceptional crystals of quartz, fluorite, calcite, and other minerals.
Today, Donghai is internationally recognized as one of China's premier mineral-producing districts. In addition to quartz, the district is well known for its beautifully crystallized fluorite and calcite, valued for their vibrant colors, transparency, and excellent crystal form. Specimens from Donghai are prized not only for their beauty but also for the remarkable geological history they represent.
This is a lovely piece that would make a great addition to any collection.
Name: Green Fluorite Cluster
Specimen Size: Large Cabinet-Sized
Dimensions: 225x140x110 mm / 8.9s5.5x4.33 inches
Weight: 2.3 kg / 5.1 lbs
Location: Donghai Mine, Jiangsu Province, China
This is a natural "Ball Peen" Mica specimen from Branchville, Connecticut. Instead of forming flat, book-like sheets as muscovite usually does, mica specimens from the Branchville Mica Mine develop a rounded, bulbous termination resembling the rounded end of a ball-peen hammer, from which its name is derived.
The Branchville Mica Mine, which has been inactive since 1944 and is mostly flooded, is one of the most historically important mineral localities in the United States. Opened in the 1870s as a mica mine, it quickly became internationally recognized for its scientific significance after Yale University mineralogists discovered an exceptional variety of rare minerals within its pegmatite. The quarry served as the type locality for several newly identified mineral species and played a key role in advancing the study of pegmatites and mineral formation. It is especially famous for producing the distinctive "ball-peen" muscovite crystals, along with fine specimens of beryl, spodumene, and other rare minerals.
This classic specimen from Connecticut will come protected in a Perky Box. The box will show its age but is just another way to show how old the specimen is. The original label when the specimen was catalogued is also a nice touch.
Name: Mica
Specimen Size: Miniature-Sized
Dimensions: 33x19x16 mm / 1.3x0.7x0.6
Weight: 10.9 Grams / 0.4 Ounces
Origin: Mined in Fillow Quarry, Branchville, Redding, Fairfield County, Connecticut, USA
This is an incredible green/yellow, fluorapatite crystal from Cerro del Mercado (Iron Mountain) in Durango, Mexico. It is completely free of the matrix and has a relatively perfect termination. The catalog number 2246 of this phantom specimen came from the Earl Calvert Collection.
At Cerro de Mercado, numerous veins containing gemmy, lemon-yellow to greenish fluorapatite crystals cut through the hematite massif. These crystals have been collected for decades from the area's iron mines, but they have become much more scarce with recent mechanization of the mining operations.
The bright, lustrous apatite crystals form hexagonal shapes with off-center terminations. They are found in vugs, often associated with quartz and calcite. Most crystals are around an inch in length, though larger crystals up to about 4 inches long have been found.
Name: Fluorapatite Crystal
Specimen Size: Thumbnail-Sized
Dimensions: Specimen 22x7x6mm / 0.9x0.3x0.2 inches
Box 33x33 mm / 1.3x1.3 inches
Weight: Specimen 2.23 grams
Origin: Mined in Cerro del Mercado, Durango, Mexico
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.
Would be a beautiful addition to any new or existing collection. Comes with a Canagem Collection specimen card.
Name: Olivine Volcanic Bomb
Specimen Size: Miniature-Sized
Dimensions: 51x36x15 mm / 2.0x1.4x0.5 Inches
Weight: 32.5 Grams / 1.1 Ounces
Details: Volcanic activity Mortlake, Victoria, Australia
This rarely offered specimen shows a group of minerals and crystals from the Aris Querries in Namibia . The grouping includes multiples of Makatite white fibres, brown to green fibres of tupperssautsiatite, black neptunite, dark brown bastneasite and pink villiaumite on host rock matrix.
Name: Makatite Crystal Cluster
Specimen Size: Cabinet-Sized
Dimensions: 45x31x15 mm / 1.8x1.2x0.6 inches
Weight: 25.2 Grams / 0.9 oz
Origin: Aris Quarries, Aris, Windhoek Rural, Khomas Region, Namibia
Polylithionite and Aegirine from Poudrette Quarry, Mont Saint-Hilaire (MSH), Quebec, represent a classic mineral association from one of the world's most important alkaline intrusive complexes. Polylithionite is a rare lithium-rich mica that typically forms thin, lustrous hexagonal plates or rosettes with a silvery, pearly, or pale bronze appearance. It commonly occurs alongside Aegirine, which develops as long, dark green to black prismatic crystals Aegirine crystals that are often sharply terminated and may occur individually or in radiating spray. The contrasting crystal habits and colors create an attractive natural association that is characteristic of Mont Saint-Hilaire.
Specimens containing Polylithionite and Aegirine are valued for illustrating the unique mineral-forming environment of this geologically significant Canadian locality. It is the perfect combination for those looking for a unique and beautiful addition to their mineral collection!
Name: Polylithionite and Aegirine Cluster
Specimen Size: Thumbnail-Sized
Dimensions: 29x25x20 mm / 1.1x1.0x0.7 inches
Weight: 8.97 Grams / 0.3 Ounces
Origin: Mined in Poudrette Quarry, Mont-Saint-Hilaire, Québec, Canada
This is a specimen of Star Mica or Muscovite and Quartz cluster. These clusters show crystals that grow in sheets or book formations. It is silvery gold with good transparency when held up to the light. The name Muscovite comes from the term Muscovy Glass which was a name for the thick sheets of Mica used as a substitute for glass Russia. The name Mica is derived from the Greek word that means to split.
On this nice specimen, the matrix faces are covered with beautiful golden yellow point stars of muscovite mica, a typical shape for this rare mica formation. The stars are the result of twinning; the points show a bit of wear but this does not detract from the beauty of such a piece.
Name: Star Mica - Muscovite with Quartz
Specimen Size: Miniature-Sized
Dimensions: 52x45x21 mm / 2.0x1.8x0.8 inches
Weight: 36.16 Grams / 1.3 ounces
Origin: Mined in Minas Gerais, Brazil
This combination of Serandite and Aegirine from Poudrette Quarry, Mont Saint-Hilaire (MSH), Quebec, is considered one of Canada's classic mineral associations. Renowned for its extraordinary mineral diversity, this quarry has produced some of the world's finest specimens of both minerals. Serandite forms beautiful salmon-pink to orange-pink prismatic crystals, while Aegirine grows as glossy black, often sharply terminated blades, that may occur individually or in radiating sprays. These minerals are often accompanied by white Albite or Analcime, producing beautiful specimens.
Serandite is the signature mineral of Mont Saint-Hilaire and is the most sought-after species coming from that locality. This beautiful crystal cluster would be a great addition to any new or existing collection.
Name: Serandite & Aegirine Crystal Cluster
Specimen Size: Miniature-Sized
Dimensions: 32x30x18 mm / 1.3x1.2x0.7 inches
Weight: 10.9 Grams / 0.4 Ounces
Origin: Mined in Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
This is an incredible green/yellow fluorapatite crystal from Cerro del Mercado (Iron Mountain) at Durango, Mexico. It is completely free of the matrix and has a relatively perfect termination. The specimen came from the Earl Calvert Collection.
At Cerro de Mercado numerous veins containing gemmy, lemon-yellow to greenish fluorapatite crystals cut through the hematite massif. These crystals have been collected for decades from the area's iron mines, but they have become much scarcer with recent mechanization of the mining operations.
The bright, lustrous apatite crystals form hexagonal shapes with off-center terminations. They are found in vugs, often associated with quartz and calcite. Most crystals are around an inch in length, though larger crystals up to about 4 inches long have been found.
Name: Fluorapatite Crystal
Specimen Size: Thumbnail-Sized
Dimensions: Specimen 22x8x7mm / Box 33x33 mm
Weight: Specimen 3.21 grams / 15.8 ct
Origin: Mined in Cerro del Mercado, Durango, Mexico
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