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Mineralpedia Details for Rhodochrosite

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Rhodochrosite

Rhodochrosite

Named for the Greek rhodon, meaning “rose” and chrosis, meaning “coloring.” Rhodochrosite is found in low-temperature to mid-temperature hydrothermal vein deposits, metamorphic rock, commonly in carbonatites, in sediments either as an authigenic or secondary mineral, and occasionally in granite pegmatites. Hundreds of widespread localities, but fine crystals may be found in Romania, Germany, Russia, Canada, the USA, Mexico, Peru, Argentina, South Africa, and Japan.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/rhodochrosite.pdf

Formula
MnCO3 
Crystal System
Trigonal 
Crystal Habit
Massive - Granular, Columnar, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
pinkish red, red, rose red, yellowish gray, brown 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
WebMineral
View Rhodochrosite 
Mindat
View Rhodochrosite 

Rhodochrosite from Haut-Ogooue, Gabon

Rhodochrosite
            from Haut-Ogooue, Gabon

Cherry red scalenohedral crystals to 5mm.

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Rhodochrosite from American Tunnel, Silverton, San Juan Co., Colorado, United States

Rhodochrosite
            from American Tunnel, Silverton, San Juan Co., Colorado, United States

Pink aggregates to 1.4cm on quartz matrix and light pink discoidal crystals to 3mm and rhombohedral crystals to over 1cm.

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Rhodochrosite from N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa

Rhodochrosite
            from N'Chwaning II mine, Kalahari Mn fields, Northern Cape Province, South Africa

Deep red glassy intergrown semi-spherical aggregate composed of sharp, less than 1mm scalenohedra with pinacoidal terminations oriented in one direction.

Large thumbnail divergent group at least twelve deep glassy red scalenohedral crystals to 2cm.

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Rhodochrosite from Santa Rita mine, Morococha dist., Yauli, Junin dept., Peru

Rhodochrosite
            from Santa Rita mine, Morococha dist., Yauli, Junin dept., Peru

Light red rhombs to 4mm covering this specimen.

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Rhodochrosite from Pachapaqui dist, Bolognesi prov., Ancash dept., Peru

Rhodochrosite
            from Pachapaqui dist, Bolognesi prov., Ancash dept., Peru

Excellent specimen with translucent, rich pink rhomb's to 7mm and light frosted rhombs to 5-10mm.

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Rhodochrosite from Uchucchacua mine, Oyon prov., Lima dept., Peru

Rhodochrosite
            from Uchucchacua mine, Oyon prov., Lima dept., Peru

Deep red, glassy scalenohedral crystals to 9mm.

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Rhodochrosite from Simms lode, Geevor mine, Pendeen, St. Just, Cornwall, England

Rhodochrosite
            from Simms lode, Geevor mine, Pendeen, St. Just, Cornwall, England

Light pink rosettes composed of saddle-shaped rhombohedra to 3mm on Quartz crystals. The Quartz seems to be coated with a brushing of light green Nontronite clay.

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Rhodochrosite from Mendip Hills, Somerset, England

Rhodochrosite
            from Mendip Hills, Somerset, England

Light pink botryoidal crystals to 3mm in vug in manganese oxide mineral.

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Rhodochrosite from Herdorf, Siegen, Westphalia, Germany

Rhodochrosite
            from Herdorf, Siegen, Westphalia, Germany

Rhombic red crystals to 1cm.

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Rhodochrosite from Sweet Home mine, near Alma, Park Co., Colorado, United States

Rhodochrosite
            from Sweet Home mine, near Alma, Park Co., Colorado, United States

Beautiful, almost gemmy, deep red rhombohedral crystals to 1cm.

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Rhodochrosite from Davidkovo, Rhodope Mountains, Bulgaria

Rhodochrosite
            from Davidkovo, Rhodope Mountains, Bulgaria
Special Info
Phillips Collection

Pink rosettes of Rhodochrosite to 5mm with Quartz and a little Chalcopyrite.

Click thumbnail images for larger view.

Rhodochrosite from Mont Saint-Hilaire, Rouville Co., Quebec, Canada

Rhodochrosite
            from Mont Saint-Hilaire, Rouville Co., Quebec, Canada

An exceptionally large, dark pink Rhodochrosite crystal that has an odd trigonal form, possibly a modification or exaggerated pinnacoidal face on the edge of a rhomb.

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Rhodochrosite from Cavnic, Maramures Co., Romania

Rhodochrosite
            from Cavnic, Maramures Co., Romania

Light soft pink Rhodochrosite in cotton-like bunches.

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Rhodochrosite from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Rhodochrosite
            from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Light pink crystalline crusts.

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Rhodochrosite from Sunnyside mine, Silverton, San Juan Co., Colorado, United States

Rhodochrosite
            from Sunnyside mine, Silverton, San Juan Co., Colorado, United States

Pink clusters of Rhodochrosite. The larger ball is 7mm across.

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Rhodochrosite from Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru

Rhodochrosite
            from Quiruvilca mine, Santiago de Chuco prov., La Libertad dept., Peru

Two pinkish red rhombic crystals to 5 and 6mm on Quartz.

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Rhodochrosite from Big Elephant mine, Telluride dist., San Miguel Co., Colorado, United States

Rhodochrosite
            from Big Elephant mine, Telluride dist., San Miguel Co., Colorado, United States

A nice locality specimen from this litlte known occurence of Rhodochrosite. This specimen features 5mm pink rhombs with light green Fluorite. Galena matrix.

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Rhodochrosite from Henderson mine, Clear Creek Co., Colorado, United States

Rhodochrosite
            from Henderson mine, Clear Creek Co., Colorado, United States

Bladed pink Rhodochrosite crystals to 6mm. Nice piece for the locality, seldon seen on the market.

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Rhodochrosite from Emma mine, Butte dist., Silver Bow Co., Montana, United States

Rhodochrosite
            from Emma mine, Butte dist., Silver Bow Co., Montana, United States

Rhombic crystals to 1.5cm in a good cluster.

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Rhodochrosite from Silverton, San Juan Co., Colorado, United States

Rhodochrosite
            from Silverton, San Juan Co., Colorado, United States

Light pink rhombs to 1cm across on white Quartz matrix.

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Rhodochrosite from Branchville, Fairfield Co., Connecticut, United States

Rhodochrosite
            from Branchville, Fairfield Co., Connecticut, United States

Pink thick plates or rhombs protruding from matrix with the phosphates of Lithiophyllite (salmon) & Dickinsonite (green).

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Rhodochrosite from Grizzly Bear mine, Uncompahgre dist., Ouray Co., Colorado, United States

Rhodochrosite
            from Grizzly Bear mine, Uncompahgre dist., Ouray Co., Colorado, United States

Soft pink crude and very thin saddle-shaped Rhodochrosite crystals with sceptor and reverse sceptor Quartz crystals to 9mm.

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Rhodochrosite from Wuzhou, Guangxi, China

Rhodochrosite
            from Wuzhou, Guangxi, China

Red crude rhombic crystals of Rhodochrosite to 1cm with just a bit of light purple Fluorite. The red is a little too red in the photos, but still as good as it gets even for Chinese Rhodochrosite. 

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Rhodochrosite from Black Rock mine, Northern Cape Province, South Africa

Rhodochrosite
            from Black Rock mine, Northern Cape Province, South Africa

Red, translucent and gemmy scalenohedral crystal.

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