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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

Quartzite

1.54

1.549

0.009

0.009

2.66

2.66

dyed green

 

jadeite simulant

 

 

 

 

band from approximately 662 nm to 688 nm

inert

inert

Gems & Gemology 1990 Spring, p101

Quartzite

1.54

1.54

 

 

2.64

2.64

green to blue-green

Badaskhshan, Afghanistan

copper-stained (malachite?), faceted (up to 18.77ct)  and cabochons, translucent, sold as "Tushkan jade", spot RI

 

 

 

 

 

 

 

The Journal of Gemmology 2017 Vol35, N6, p475-476

Quartzite

1.55

1.55

 

 

2.64

2.64

purple (dyed)

 

 

 

 

 

 

broad band from 540-580nm

 

 

Gems & Gemology 1998 summer, p 131-132

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Quartzite

1.544

1.553

0.009

0.009

2.58

2.69

 

 

 

 

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

Quartzite

1.544

1.553

0.009

0.009

2.641

2.691

 

 

 

 

Gemology Tools Professional 2010

aventurine quartz

1.544

1.553

0.009

0.009

2.64

2.69

 

 

 

 

Gemology Tools Professional 2010

aventurine quartz

1.539

1.557

0.009

0.01

2.64

2.69

1.549

1.557

1.539

1.550

http://www.geminterest.com 

aventurine quartz

1.53

1.554

0.001

0.01

2.62

2.7

 

 

 

 

Gemmo.eu 2018

Quartzite

 

 

 

 

2.64

2.69

 

 

 

 

Joel Arem, Color Encyclopedia of Gemstones, 1987 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

aventurine quartz

green

fuchsite inclusions

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

fuchsite

aventurine quartz

Gemmological Tables, Ulrich Henn , GGA, 2004

pyrite

aventurine quartz

www.geminterest.com

 

LOCALITIES

 

CHEMICAL DATA (%)