Turquoise

Origin: Gunheath Pit, St. Austell, Cornwall, England
Sample size: 7 x 7 x 5 cm
 
  
  
 
  
 
  
 
     
Turquoise pseudomorph after apatite
Origin: Mashaan, China (near Mongolia)
Sample size: 7.8 x 6.0 x 3.9 cm (top/2nd row), 6.3 x 3.8 x 3.5 cm (3rd row), 5.6 x 5.4 x 4.6 cm (4th row), 6.3 x 3.6 x 3.2 cm (bottom)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

Origin: Field near the Hochstraße, Rengersdorf, Görlitz, Oberlausitz, Saxony, Germany
Picture size: 4.5 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

  
Origin: Mona Lisa mine, Polk Co., Arkansas, United States
Sample size: 5.5 x 4.5 x 3 cm
 
  
Blue crystal aggregates to 1 mm composed of pointed bladed crystals contrasting well on white perhamite and prismatic wavellite.
  
Fine, micro bladed aggregates of turqouise crystals to 0.2 mm across goethite matrix. Ex. Eaton collection
  
Blue crystal aggregates of platy, pointed crystals to 0.2 mm with darker blue spheroidal cuprian morinite on white perhamite and wavellite.
  
Greenish bladed aggregates of turquoise to 1 mm on a fine matrix of variscite with grey chlorargyrite and white, prismatic wavellite.
Origin: Silver Coin mine, Humboldt Co., Nevada, United States
Sample size: 8 x 6 x 4 cm (top), 5 x 3 x 3 cm (2nd row), 7 x 2 x 5 cm (3rd row), 4 x 3 x 2 cm (bottom)
 
  
  
Origin: Bishop mine, Lynch Station,Campbell Co., Virginia, United States
Ex. Kidwell collection
Sample size: 4 x 5 x 4 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Back to Page 1     Page 3     Page 4     Page 5     Page 6     Page 7     Page 8     Page 9     Page 10

Back to Alphabetical list Physical, chemical and crystallographic description Optical properties/Thin sections SEM images TEM images vibrational spectra description IR spectra Raman spectra N-IR spectra F-IR spectra IES spectra