Up to $50

Fine crystal cluster of Quartz points surrounded by many Bornite and Pyrite crystals from the famous Leonard Mine at Butte. The nubby, matte-finish bornite crystal clusters are attractively scattered across the specimen with contrasting brassy pyrite crystals and quartz crystal points. 

This top specimen is in very good condition. Would be a beautiful addition to any new or existing collection.

Name: Quartz Points, Bornite and Pyrite Crystal Cluster 
Specimen Size:  Miniature-Sized 
Dimensions:  41x17x19 mm / 1.6x0.7x0.7 inches
Weight:      9.63 Grams / 0.3 oz
Origin: Mined in Leonard Mine, Butte Mining District, Montana 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 Specimen
Dimensions:  34x30x33  mm / 1.3x1.2x1.3 inches
Weight: 38 grams / 1.3 ounces
Origin: White Desert, Farafra Oasis, Egypt

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 Specimen
Dimensions:  31x22x23  mm / 1.2x0.9x0.9 inches
Weight: 17 grams / 0.6 ounces
Origin: White Desert, Farafra Oasis, Egypt

Lapis lazuli or lapis for short, is a deep-blue metamorphic rock used as a semi-precious gemstone that has been prized since antiquity for its intense color.  This specimen shows deep blue with sparks of pyrite and is in great condition.

Product Type: Lapis Lazuli Rough
Specimen Size: Miniature-Sized
Dimensions:  51x51x26 mm / 2.0x2.0x1.0 inches
Weight: 83.7 Grams / 2.9 ounces
Origin: Afghanistan

This is an attractive specimen of calcite crystals from the Wessels Mine, Kuruman, South Africa.  The entire top surface of the specimen is covered with many sharp well formed calcite crystals. Some are a frosted snow white ball shape which sit amongst a sharper sparkly druzy calcite. It is in excellent condition.

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.

Name: Calcite Crystal
Specimen Size:  Cabinet-Sized
Dimensions:  61x50x35 mm/ 2.4x2.0x1.4 inches 
Weight: 96.82 Grams / 3.4 Ounces 
Origin: Mined in Wessels Mine, Kuruman, South Africa 

Iceland spar, formerly called Iceland crystal (Icelandic: silfurberg [ˈsɪlvʏrˌpɛrk], lit. 'silver-rock') and also called optical calcite, is a transparent variety of calcite, or crystallized calcium carbonate, originally brought from Iceland, and used in demonstrating the polarization of light.  

The most common crystal structure of Iceland spar is rhombohedral, but other structures, such as scalenohedral or prismatic, can form depending on formation conditions. Iceland spar is primarily found in Iceland but can occur in different parts of the world with suitable geological conditions such as China.

Name: Iceland Spar Optical Calcite
Specimen Size:  Miniature-Sized
Dimensions: 30x27x25 mm / 1.2x1.1x1.0 inches 
Weight: 60.8 Grams / 2.1 Ounces
Origin: Guangxi Province, China

Brazilianite forms beautiful crystals and it can be quite striking. This bright yellow green single terminated crystal would be a great addition to any new or existing collection.

Name:  Brazilianite
Specimen Size:  Thumbnail-Sized  
Dimensions:   Specimen & Box 33x33 mm / 1.3x1.3 inches  
Weight:  11.5 Grams / 0.4 Ounces (including box)  
Origin: Mined in Córrego Frio mine, Linópolis, Divino das Laranjeiras, Minas Gerais, Brazil

This is a beautiful, fully terminated thumbnail sized Quartz Point. 

Quartz crystals are among the most abundant and well-known minerals on Earth. Quartz belongs to the hexagonal crystal system. It typically forms six-sided prismatic crystals with a pointed termination. Its crystals can be colorless or exhibit a wide range of colors. The color variations are often due to the presence of impurities or trace elements during the crystal's formation. Quartz is transparent to translucent. 

This specimen would be a beautiful addition to any new or existing collection.

Name: Quartz Point
Specimen Size:  Thumbnail-Sized
Dimensions:  Specimen 26x8x8 mm / 1.0x0.3x0.3 inches
                      Specimen Box 33x33 mm / 1.3x1.3 inches  
Weight:  11.2 Grams / 0.4 Ounces (including box)  
Origin:  Bennet Quarry, Buckfield, Maine

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 Specimen
Dimensions:  35x22x20  mm / 1.4x0.9x0.8 inches
Weight: 17 grams / 0.6 ounces
Origin: White Desert, Farafra Oasis, Egypt

This is a very fine and lustrous Stilbite from Parsboro, Cape d'Or, Nova Scotia, Canada. It was collected in 2002 and is a group of well terminated crystals with nice sharp edges.  

Stilbite is a zeolite mineral appreciated for its delicate crystal formations and pastel hues, ranging from colorless to white, yellow, pink, and peach.  It forms distinctive tabular crystals with a bowtie or butterfly shape and exhibits a vitreous to pearly luster. Commonly found in cavities in volcanic rocks, stilbite is often associated with other zeolite minerals. It is valued for its aesthetic appeal and is believed by some to have calming energy, supporting spiritual growth and emotional healing.