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Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
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Museum of Nature sp.
Photo by Violet Anderson
© Royal Ontario Museum

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
Photo by Violet Anderson
© Royal Ontario Museum

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
Photo by Violet Anderson
© Royal Ontario Museum

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Doug Merson

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Bill Lechner

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Steven Stuart

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Gilles Haineault

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Home > Mineral Descriptions > Rhodochrosite - (16 Photos)



Rhodochrosite
MnCO3

     At Mont Saint-Hilaire, rhodochrosite is a common late-stage mineral in pegmatites and altered pegmatites. Some crystals up to 10cm have been found, however, these large crystals are generally with unattractive coloration and transparency.

PHYSICAL CHARACTERISTICS:

Color ranges from very pale pink, pale to deep red, orange-red,
   brownish red, orange-brown, pale to dark brown and black (dark
   brown and black colors are due to partial alteration to birnessite).
Luster is vitreous to greasy to dull.
Diaphaneity is transparent to translucent or opaque for the
   larger crystals.
Crystal System is hexagonal; R3c.
Crystal Habits include simple rhombohedra, aggregates of curved
   rhombohedra forming druses, balls and rosettes; uncommonly found
   as thin, twinned, triangular plates, scalenohedra, thin hexagonal
    plates and botyroidal aggregates.
Cleavage {101} is perfect.
Fracture uneven to conchoidal.
Hardness is 3.5 to 4
Specific Gravity is approximately 3.7g/cm3
Streak is white.
Associated Minerals include aegirine, albite, amphibole group, analcime,
   ancylite, astrophyllite, bastnäsite, calcite, catapleiite, donnayite,
   epididymite, eudialyte, fluorite, gaidonnayite, leifite, leucophanite,
   mangan-neptunite, marcasite, microcline, monteregianite, natrolite,
   nenadkevichite, nordstrandite, polylithionite, pyrochlore, pyrophanite,
   sérandite, strontianite and zircon.
Distinguishing Features: Color, crystal habits.
Origin: Named in 1800 from the Greek rhodon, rose and chrosis,
   a coloring, referring to its color.

CLASSIFICATION:

Dana System
# 14.1.1.4

Strunz Classification
# V/B.02-50

REFERENCES:
MinRec 21:332-333 (1990), Dana 8:436-438 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
¤¤

AP
¤¤

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

Legend

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Doug Merson

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Jason B. Smith

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Steven Stuart

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Steven Stuart

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Steven Stuart

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
© Steven Stuart

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
Photo by R. Lavinsky
© www.irocks.com

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
Photo by R. Lavinsky
© www.irocks.com

Rhodochrosite crystals - click for larger pic
Rhodochrosite crystals
Photo by R. Lavinsky
© www.irocks.com