Andalusite

  
Origin: Custer Co., South Dakota, USA
Sample size: 6 x 5 x 5 cm, crystal 4 x 2 x 2 cm
 
  
Origin: Black Hills, South Dakota, United States
Ex. Erling collection
Sample size: 5.5 x 2 x 1.5 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

  
Manganoan andalusite (viridine)
Origin: Conquista, Bahia, Brazil
ex. Dr. Fred Pough Collection
Sample size: 5 x 3 x 2.5 cm
 
  
Variety chiastolite
Origin: Lisental, Tyrol, Austria
Ex. Richard Hauck collection
Sample size: 8.3 x 6.5 x 5.1 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

Large pink crystal with little mica-rich matrix
Origin: Coma de Ransol, Andorra
Sample size: 3.5 x 4 cm
 
Variety chiastolite
Origin: Madera County, California, U.S.A.
Sample size: 1 cm in diameter, polished for better display of the regular arrangement of carbonaceous impurities
 
Variety viridine
Origin: Ultevis, Lapland, Sweden
Sample size: 3.5 x 6 cm
 
Origin: Serra de Arga, Portugal
Sample size: 2 x 4.5 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

  
Origin: Mount Howden Mine, Olary Province, South Australia, Australia
Sample size: 2.3 x 2.1 x 5.8 cm
 
  
 
 
 
 
  
 
  
Origin: Cargo Muchacho Mtn., Imperial Co., California, U.S.A.
Ex. Don Belsher collection
Sample size: 3.6 x 2.3 x 4.4 cm (top), 5.6 cm wide (2nd row), 5.3 cm tall (3rd row), 4 cm long (4th row), 2.8 x 2.8 x 4.9 cm (5th row), 8.6 x 4.8 x 3.4 cm (bottom)
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

Page 2

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