Gemsdat
 

                Home            Gemstones

 

      

 

INVESTIGATIONS

Stone

RI min

RI max

Dens min

Dens max

Colour

Location

Info

Spectrum

UVS

UVL

Reference

Hydrogrossular

1.68

1.705

3.24

3.35

pink

Brits, Transvaal, South Africa

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1996 Dec, p189-197

Hydrogrossular

1.69

1.705

3.298

3.342

pink

Transvaal, South Africa

 

463nm line

inert

inert

Gems & Gemology 1966 summer, p49-57

Hydrogrossular

1.7

1.7

3.52

3.52

pink

 

 

 

 

 

ACAM labo 

Rodingite -Hydrogrossular

1.71

1.73

3.4

3.47

pink, grey, greenish

Jordanow, Poland

hardness 6-7, rock composed of 90% massif grossular, ornamental stone

 

 

 

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1988 37, Nr 3/4, p144-145

Hydrogrossular

1.711

1.728

3.362

3.49

green

Transvaal, South Africa

 

463nm line

inert

inert

Gems & Gemology 1966 summer, p49-57

Hydrogrossular

1.72

1.72

3.42

3.45

green, translucent

 

bangles 339 and 400 ct, jadeite simulant, spot RI

 

inert

inert

Gems & Gemology 2015 Fall, p 342-343

Hydrogrossular

1.725

1.734

3.44

3.54

green

Brits, Transvaal, South Africa

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1996 Dec, p189-197

 

TABLES

Stone

RI min

RI max

Dens min

Dens max

Reference

Hydrogrossular

1.632

1.632

2.76

2.76

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

Hydrogrossular

1.675

1.742

3.19

3.68

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

Hydrogrossular

1.675

1.705

3.27

3.27

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

Hydrogrossular

1.68

1.712

3.25

3.4

Gemmological Tables, Ulrich Henn, 2004 

Hydrogrossular

1.69

1.73

3.15

3.55

Gemology Tools Professional 2010

Hydrogrossular

1.69

1.73

3.24

3.55

Gemmo.eu 2013

Hydrogrossular

1.702

1.702

3.35

3.35

http://www.geminterest.com 

Rodingite -Hydrogrossular

1.702

1.702

3.35

3.35

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

Hydrogrossular

1.71

1.734

3.3

3.5

Gemmological Tables, Ulrich Henn, 2004 

Hydrogrossular

1.727

1.785

3.58

3.72

http://www.gemmology.be 

Hydrogrossular

1.728

1.735

3.42

3.6

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

Hydrogrossular

1.738

1.744

3.63

3.69

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

Hydrogrossular

 

 

3.4

3.52

John Sinkakas, Gemstone and mineral data book,1972 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Hydrogrossular

green

Cr³+ in octahedral coordination

Gems & Gemology Summer 1988

Hydrogrossular

pink

Mn³+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

chromite

Hydrogrossular

Gemmologie, 1996 Dez, p196

 

LOCALITIES

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

MnO

MgO

FeO

TiO2

CaO

Na2O

Cr2O3

Fe2O3

K2O

Hydrogrossular

green

Transvaal

South-Africa

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1996, Dec, p192

37.82

17.69

0.04

0.04

3.92

0.18

36.37

 

2.42

 

 

Hydrogrossular

green

 

South-Africa

The Journal of Gemmology 2007,30,5/6,307-319

38.64

20.05

0.24

0.01

 

0.06

37.50

 

0.41

1.15

0.01

Hydrogrossular

pink

Transvaal

South-Africa

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1996, Dec, p192

33.13

21.51

0.68

0.11

0.58

0.02

36.42

 

0.01

 

 

Hydrogrossular

pink

Transvaal

South-Africa

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1996, Dec, p192

34.37

21.91

0.35

0.14

0.45

0.03

36.89

 

0.01

 

 

Hydrogrossular

pink

 

South-Africa

The Journal of Gemmology 2007,30,5/6,307-319

36.87

20.89

0.93

0.03

 

0.01

37.59

0.01

0.01

0.67

0.01