Gemsdat
 

                Home

 

INVESTIGATIONS

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

Colour

Locality

Info

nx min

nx max

ny min

ny max

nz min

nz max

Spectrum

UVS

UVL

Reference

Johachidolite

1.716

1.728

0.008

0.012

3.44

3.44

colourless, light green, yellow and orange

 

 

1.716

1.717

1.720

1.721

1.725

1.728

 

inert to strong blue

inert to medium blue

Contributions to Gemology GRS 2007 Nov N5

Johachidolite

1.717

1.725

0.006

0.008

3.23

3.67

orange, light yellow, very light green, yellow-orange

Myanmar

 

1.717

1.718

 

 

1.724

1.725

 

 

sometimes weak blue

Gems & Gemology 2008 fall 246-251

Johachidolite

1.717

1.724

0.007

0.007

3.45

3.45

pale yellow

probably Mogok, Myanmar

chelsea : yellowish-green, 14ct

1.717

1.717

1.720

1.720

1.724

1.724

none

weak blue

strong whitish blue

The Journal of Gemmology 1998 Vol 26, N5, p324-329

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

nx min

 nx max

ny min

ny max

nz min

nz max

Reference

Johachidolite

1.71

1.73

0.005

0.014

3.38

3.43

1.710

1.719

1.717

1.726

1.718

1.730

http://www.geminterest.com 

Johachidolite

1.71

1.73

0.06

0.015

3.36

3.46

 

 

 

 

 

 

Gemmo.eu 2019

Johachidolite

1.712

1.729

0.007

0.014

3.37

3.45

1.712

1.717

1.717

1.720

1.724

1.729

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

Johachidolite

1.712

1.726

0.014

0.014

3.37

3.37

 

 

 

 

 

 

Gemology Tools Professional 2016

Johachidolite

1.717

1.724

0.007

0.007

3.45

3.45

1.717

1.717

1.720

1.720

1.724

1.724

Gemmological Tables, Ulrich Henn, 2004 

Johachidolite

1.717

1.724

0.007

0.007

3.45

3.45

1.717

1.717

1.720

1.720

1.724

1.724

Michael O'Donoghue, Gems: Their Sources, Descriptions and Identification (2006),  873pp 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

phlogopite

Johachidolite

Contributions to Gemology N5 Nov 2007 GRS, p18

thorianite-uraninite

Johachidolite

Contributions to Gemology N5 Nov 2007 GRS, p18

 

LOCALITIES

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

MgO

FeO

CaO

Na2O

B2O3

ThO2

Johachidolite

colourless

 

 

Contributions to Gemology N5 Nov 2007 GRS

0.079

23.5

0.027

0.039

28

0.002

48.2

0.063

Johachidolite

yellow-orange

 

 

Contributions to Gemology N5 Nov 2007 GRS

0.099

23.6

0.066

0.042

27.9

0.002

48.1

0.003

Johachidolite

yellow-orange

 

 

Contributions to Gemology N5 Nov 2007 GRS

0.076

23.3

0.046

0.038

27.8

0.001

48.7

0.001

Johachidolite

yellow-orange

 

 

Contributions to Gemology N5 Nov 2007 GRS

 

24.1

0.066

0.036

28.2

0.002

47.5

0.004