Andradite

  
Origin: Mont Saint-Hilaire, Quebec, Canada
Sample size: 5.3 x 3.5 x 2.5 x cm
 
  
Origin: Tepueste Ranch, Sonora, Mexico
Ex. Irv Brown collection
Sample size: 2.0 x 2.0 x 0.7 cm
 
  
 
  
Andradite pseudomorph after twinned rhodochrosite crystal with gaudefroyite
  
Origin: Wessels Mine, Kalahari Manganese Fields, South Africa
Ex. Charlie Key collection
Sample size: 5.6 x 2.1 x 1.3 cm (top), 5.5 x 5.3 x 1.7 cm (2nd/3rd row), 6.3 x 4.2 x 3.0 cm (bottom)
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Origin: Clear Creek area, New Idria District, San Benito Co., California, U.S.A.
Sample size: 6.1 x 3.3 x 2.3 cm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

  
Variety demantoid on serpentinite matrix
Origin: Malenco Valley, Sondrio Prov., Lombardy, Italy
Sample size: 7 x 3.5 x 5.5 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

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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