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Pyroxmangite with Sphalerite

#AH53373

Pyroxmangite with Sphalerite

#AH53373
Availability
Sold
Size
4 x 4 x 3 cm - Miniature 
Formula
Mn2+SiO3 (RRUFF)
Locality
Sunnyside mine, Silverton, San Juan Co., Colorado, United States

Excellent specimen for micro mineralogy. The Pyroxmangite occurs as superb, pink, bladed crystals to 2mm. With it are exceptional crystals of green Sphalerite to 3mm. Amongst these crystals are white sprays of what I believe are Calcite clusters, brown rounded Rhodochrosite groups and waterclear Quartz crystals.

Tons of massive pink Pyroxmangite was once collected on the dumps. It was originally thought to be Rhodonite but later redefined as Pyroxmangite. Crystals such as these are rare from the Sunnyside. Given the quality of crystals on this specimen, it is doubtful it came from the dump. It was originally from the Fred Bird collection, which Hampson obtained.

The Sunnyside mine is one of Colorado's most famous, and infamous mines. In 1978, the upper workings directly below Lake Emma collapsed sending four million tons of mud through the mine. Fortunately the mine was idle that day and no one was killed. It took two years to clean out the muck.

Pyroxmangite

Formula
Mn2+SiO3 
Crystal System
Triclinic 
Crystal Habit
Massive, Massive - Granular 
Cleavage
Perfect, Perfect, None 
Luster
Vitreous - Pearly 
Color
pink, rose pink, purplish pink, yellowish red brown, brown 
Streak
white 
Class
Triclinic - Pinacoidal 
Hardness
5.5-6 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection

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