Andradite

  
Origin: La Valenciana, Mendoza, Argentina
Sample size: 5.6 x 4 x 2 cm
 
  
This specimen is a crystal of andradite with inclusions of epidote. It was popped off of its clinochlore matrix.
Origin: near Jalalabad, Afghanistan
Sample size: 4.9 x 4.7 x 3 cm
 
  
Variety demantoid
Origin: Concordia, Piedra parada (las vigas), Municipia de Tatalia, Vera Cruz, Mexico
Ex. Keith Hayes collection
Sample size: 4.3 x 3.3 x 1.7 cm
 

Photo courtesy of: 

John Veevaert, Trinity Mineral Co

Trinityminerals.com

 

  
  
Origin: Dalnegorsk, Russia
Sample size: 6 x 4.5 x 2 cm
 
  
Origin: Wessels Mine, near Kuruman, Kalahari, South Africa
Willy Israel Collection
Sample size: 4.5 x 2.5 x 2.5 cm
 
  
  
Origin: Grube St. Chistoph, near Breitenbrun, Ehrenfriedersdorf, Erzebirge, Saxony, Germany
Sample size: 5 x 5 x 3.5 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

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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