rhodochrosite cabochon from Colorado, U.S.
rhodochrosite
rhodochrosite crystal from Perou
pink rhodochrosite on calcite crystal from Perou
rhodochrosite on Quartz from Peru
round cut rhodochrosite from Africa
rhodochrosite cabochon from Colorado, U.S.
rhodochrosite
Detailed sheet
rhodochrosite
The gem variety, which is only marketed since 1950, yet named dialogite or “Inca Rose”, saw its name derived from the Greek “rhodon” for rose.
In fact, the term dialogite was reserved to rhombohedral crystals.
It is of a pinkish red to yellowish color, with scalloped or parallel bands alternately light and dark. The most popular color is raspberry.
CHEMICAL CHARACTERISTICS
MnCO3
manganese carbonate
PHYSICAL CHARACTERISTICS
Main color
pink
Other colors
yellow
deep pink sometimes tends to yellow with age
Color of streak
white
Luster
greasy, pearly, vitreous
Hardness
4.0 to 0.0
Density
3.45 to 3.71
Cleavage
perfect
Fracture
uneven
OPTICAL PROPERTIES
Transparency
opaque, translucent, transparent
The massive variety is opaque or translucent in thin blades, the gem variety is transparent
Refractive index
1.590 - 1.830
Double refraction
0.200
important uniaxial - negative
visible double refraction
Yes
Dispersion
0.015(0.010)
Pleochroism
definite
Number of colors
2
when transparent
Absorption spectrum
551 - 449 - 412
rhodochrosite spectrum system
Fluorescence
weak
reddish
Inclusions
galena
CRYSTALS PROPERTIES
rarely well crystallized, often observed cleavages
crystals system
trigonal
OTHER INFORMATIONS
Astrological sign
Aquarius, Aries, Capricorn, Leo, Libra
APPROACHING GEMS
Exploited
sites
The region of San Luis, 230 km from Mendoza (Argentina) is a dominant producer with its stalagmites that have formed in mines abandoned by the Incas since the thirteenth century. We can add South Africa, Greece, Romania, Hungary, Chile, the United States, Mexico, Peru.
For the gem varieties: the historical deposits are those of N’Chawning Mine in South Africa and the Sweet Home Mine in Colorado, USA.
Today the quality gemstones come mainly from China.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
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