Helvite

  
Origin: Unverhofft Gluck mine, Antonstal, Erzgebirge, Germany
Sample size: 7 x 5 x 3 cm, crystals 1 mm
 
  
 
  
 
 
     
 
     
 
  
 
     
 
     
Helvine on albite
Origin: Navegador mine, Conselheiro Pena, Minas Gerais, Brazil
Sample size: top 2.5 x 1 cm with tetragonal crystals to 4 mm, 2nd row 1.5 x 1.5 cm with 7 mm crystals,
3rd row 1.5 x1.5 cm with 8 mm crystals, 4th row 11 x 8 x 5 cm with 18 crystals averaging 6 mm,
5th row 3.6 x 2 x 1 cm with several crystals to 6 mm, 6th row 8 x 6 x 2 cm with several crystals to 7 mm,
7th row 6 x 5 x 4 cm with a few crystals to 8 mm, along with a few micros of spessartine, bottom 11 x 6 x 3 cm, dozens of crystals to 7 mm
 
  
Origin: Grandview mine, Grant Co.,, New Mexico, United States
Sample size: 6 x 5.5 x 4 cm
 
  
Origin: Victoria district, Gage, New Mexico, United States
Ex. DeVito Collection
Sample size: 7 x 7 x 3 cm
 
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Origin: Unverhofft Glück an der Achte Mine, Antonsthal, Breitenbrunn District, Erzgebirge, Saxony, Germany
Picture size: 6 mm
Owner: Thomas Witzke
 

Photo courtesy of: 

Thomas Witzke

Institut für Mineralogie und Lagerstättenlehre
Aachen, Germany

 

  
  
Helvite with hematite and quartz
Origin: Jinlong, Longchuan (Laolong), Guangdong, Central South Region, China
Sample size: 6.5 x 6.9 x 8.3 cm
 
  
Sharp brown opaque well formed crystals of helvite to 17 x 17 mm in size scattered about a matrix of brownish blocky microcline crystals with smoky quartz. Minor spessartine is in association.
  
Helviet with spessartine
Origin: Wushan Mine, Tongbei, Yunxiao, Zhangzhou area, Fujian, East Region, China
Sample size: 9.1 x 8.3 x 2.6 cm (top/2nd row), 10 x 10.1 x 3.3 cm (bottom)
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

Page 2     Page 3     Page 4     Page 5

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