Montroydite

  
Micro red acicular crystals to about 0.75 mm on black edgarbaileyite. Native mercury is also present.
  
Rusty red platy micro crystals of montroydite to about 0.1 mm or less on black edgarbaileyite.
Origin: Clear Creek mine, San Benito Co., California, United States
Sample size: 3.5 x 2 x 1.5 cm (top), 3.5 x 2 x 1 cm (bottom)
 
  
Dark red, needle like crystals to 1mm throughout a large 3 x 2.5 vug associated with native mercury. Ex. Kaar collection
  
Dark red platy crystals to 1 mm
  
Blood red tiny crystals to less than 0.2 mm in vug about 7 mm long.
Origin: Socrates mine, Sonoma Co., California, United States
Sample size: 7 x 5 x 3 cm (top), 7 x 6 x 3 cm (2nd row), ca. 1.5 x 1.5 x 1 cm (bottom)
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

  
Thick vein of dark red montroydite with orange kleinite in calcite
Origin: Mariposa Mine, Brewster Co., Terlingua District, Texas, U.S.A.
Ex. Edgar Bailey collection
Sample size: 2.7 x 2.2 x 1.5 cm
 

Photo courtesy of: 

Rob Lavinsky

The Arkenstone

 

  
Origin: near New Idria Mine, San Benito Co., California, U.S.A.
Sample size: 29 x 14 x 14 mm
 

Photo courtesy of: 

Dan Weinrich

Dealer in fine mineral specimens

 

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