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INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Location

Info

ne min

ne max

no min

no max

Spectrum

UVS

UVL

Reference

Rhodochrosite

1.58

 

 

 

3.59

3.59

pinkish red

 

19.7ct, opaque

 

 

 

 

 

inert

inert

ACAM Lab 

Rhodochrosite

1.59

 

 

 

3.5

3.6

pink with white bands

Capillitas, Catamarca, Argentina

 

 

 

 

 

 

red-violet

weak black-pinkish

Gems & Gemology 1973 Spring, 141-143

Rhodochrosite

1.597

1.812

 

 

3.64

3.64

pinkish to deep red, with orange, brown, and black secondary colours

Hotazel,  South-Africa

 

 

 

 

 

band at 535-565nm, lines at 551 and 410nm

inert

inert, dull red

Gems & Gemology 1997 summer p130

Rhodochrosite

1.599

 

 

 

3.7

3.71

pinkish orange to pink-orange

Sweet Home Mine, Colorado

 

1.599

1.600

 

 

strong band at 415nm, two broader bands at 440-470 and 540-560

inert

inert

Gems & Gemology 1997 summer p122-133

Rhodochrosite

1.602

 

 

 

3.72

3.72

orangy red

Hotazel, North Cape Province, South africa

5.21ct, transparent

 

 

 

 

broad absorption below 420nm, between 445-465nm, between 550-560nm

inert

inert

GIA Gem Database  35019

Rhodochrosite

1.602

 

 

 

3.71

3.71

 

 

0.9ct

 

 

 

 

 

red

 

ACAM Lab  538

Rhodochrosite

1.603

 

 

 

3.72

3.72

 

Minas Gerais, Brasil

7.78ct

 

 

 

 

 

weak red

inert

The Journal of Gemmology 2015 Vol 34, No.6, p473-475

Rhodochrosite

1.62

 

 

 

3.71

3.71

pink

 

2.55ct

 

 

 

 

 

inert

inert

ACAM Lab  2072

Rhodochrosite

 

 

 

 

3.71

3.71

red

Sweet Home Mine, Park County, Colorado, USA

4.62, transparent

 

 

 

 

broad absorption below 420nm, between 440-460nm, between 535-555nm

inert

inert

GIA Gem Database  35491

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Rhodochrosite

1.578

1.82

0.208

0.22

3.45

3.7

1.578

1.600

1.786

1.820

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Rhodochrosite

1.578

1.86

0.201

0.22

3.3

3.74

1.578

1.695

1.786

1.860

Gemme, Dati per l'identificazione, P. De Stefano et al, 1993 

Rhodochrosite

1.578

1.84

0.201

0.22

3.4

3.71

 

 

 

 

http://www.gemmology.be 

Rhodochrosite

1.578

1.84

0.201

0.22

3.4

3.6

1.578

1.695

1.786

1.840

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Rhodochrosite

1.578

1.84

0.201

0.22

3.3

3.7

1.578

1.695

1.786

1.840

http://www.geminterest.com 

Rhodochrosite

1.578

1.84

0.201

0.22

3.4

3.72

1.578

1.695

1.786

1.840

Tables of Gemstone Identification, Roger Dedeyne, Ivo Quintens, 2007 

Rhodochrosite

1.58

1.82

0.201

0.22

3.45

3.7

1.580

1.600

1.788

1.820

Gemmological Tables, Ulrich Henn, 2004 

Rhodochrosite

1.58

1.82

0.21

0.22

3.45

3.7

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Rhodochrosite

1.594

1.82

0.22

0.22

3.45

3.7

 

 

 

 

Gemology Tools Professional 2010

Rhodochrosite

1.595

1.815

0.215

0.22

3.5

3.72

 

 

 

 

Gemmo.eu 

Rhodochrosite

1.597

1.82

 

 

3.45

3.7

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Rhodochrosite

1.6

1.62

0.22

0.22

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Rhodochrosite

1.6

1.82

0.22

0.22

3.45

3.7

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Rhodochrosite

pink to red

Mn²+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Rhodochrosite

Capillitas Mine

Andalgala

Catamarca

Argentina

Gems & Gemology 1973 Spring, p141-143

Rhodochrosite

Poudrette quarry

Mont Saint-Hilaire, Rouville County

Québec

Canada

Zeitschrift der Deutschen Gemmologischen Gesellschaft, 1994, Dez, p137

Rhodochrosite

Wudong Mine, Liubao ("Babu"), Cangwu

Wuzhou Prefecture

Guangxi Zhuang Autonomous Region

China

Ottens, B. - China: Mineralien, Fundstellen, Lagerstätten (2008)

Rhodochrosite

Hotazel

Kalahari manganese fields

Northern Cape Province

South Africa

Gems & Gemology 1997 summer p130

Rhodochrosite

Sweet Home Mine, Alma district

Park County

Colorado

USA

Gems & Gemology 1997 summer p122-133

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

MnO

MgO

FeO

CO2

Rhodochrosite

pink

Capillitas

Argentina

Gems & Gemology 1973, Spring, p142

55.82

2.05

2.4

38.35