Hemihedrite

Origin: Florence Pb-Ag mine, Wickenburg, Maricopa Co., Arizona, U.S.A.
Owner: Lou Perloff
Microscopic image
 

Photo courtesy of: 

Lou Perloff

Photo-Atlas of Minerals

 

  
Specimen full of pockets of red to dark red phoenicochroite showing what the books call "polycrystalline" masses or "indistinguishable" crystals. The crystals are about 0.75 mm and on this and the other specimen in this update single crystals are seen if you look hard. Surrounding these vugs and within the pockets of phoenicochroite are yellow hemihedrite crystals to 1mm. Both are abundant. Mimetite also occurs as a powdery yellow masses along with cerussite micro crystals.
  
Crude yellow Hemihedrite crystals to 0.5mm within pockets of phoenicochroite occuring as deep red indistinguishable crystals to 0.5 mm. This is a very good specimen showing how both these minerals have altered from a galena crystal as see upper right in photo. Cerussite also occurs. Ex. Erling Collection
  
 
  
 
  
Orange, massive and hemihedral microcrystals. The phoenicochroite is red and also microcrystalline.
Origin: Pack Rat claim, Maricopa Co., Arizona, United States (type locality)
Sample size: 6 x 4 x 4 cm (top), 5 x 3 x 3 cm (2nd row), 7 x 6 x 3 cm (3rd row), 7 x 5 x 5 cm (4th row), 7 x 4.5 x 4 cm (bottom)
 
  
  
Bright orange micro crystals, crudely formed or so-called hemihedral forms (thus the name), to about 0.5 mm filling vugs in and on cerussite associated with wulfenite and possibly phoenicochroite. Some of these look like iranite. Galena matrix.
Origin: Florence Lead-Silver mine, Tortilla Mountains, Pinal Co., Arizona, United States
Sample size: 6 x 3.5 x 5 cm
 

Photo courtesy of: 

Tom Loomis

Dakota Matrix Minerals

 

Greyish-brown massive with phoenicochroite on matrix
Origin: Potter Claim, near Wickenburg, Arizona, USA
Sample size: 4 x 6 cm
 

Photo courtesy of: 

Diederik Visser

Diederik Visser Minerals & Petrological Services

 

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