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INVESTIGATIONS

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

1.57

1.616

0.046

0.046

2.95

2.96

colourless, light violet, rarely pink

Hormoz and Qeshum Islands, Iran

1-5ct

1.57

1.57

1.58

1.58

1.62

1.62

none

inert

inert

Gems & Gemology 2000 Fall p262

1.575

1.575

 

 

2.93

2.93

blue

 

aggregate, translucent

 

 

 

 

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2005 Sep, p68-69

1.57

 

 

 

3.01

3.01

purplish red

 

9.55ct

 

 

 

 

 

 

 

very weak yellow

inert

GIA Gem Database  34967

 

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

Anhydrite

1.567

1.618

0.044

0.046

2.9

2.98

1.567

1.574

1.574

1.579

1.609

1.618

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

Anhydrite

1.57

1.614

0.044

0.044

2.95

3

1.570

1.570

1.576

1.576

1.614

1.614

Gemmological Tables, Ulrich Henn, 2004 

Anhydrite

1.57

1.614

0.044

0.044

2.9

2.99

 

 

 

 

 

 

http://www.gemmology.be 

Anhydrite

1.57

1.614

0.044

0.044

2.9

3

1.570

1.570

1.575

1.576

1.614

1.614

http://www.geminterest.com 

Anhydrite

1.57

1.614

0.044

0.044

2.9

2.98

1.570

1.570

1.575

1.575

1.614

1.614

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Anhydrite

1.571

1.614

0.043

0.043

2.9

2.98

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Anhydrite

1.571

1.614

0.043

0.043

2.9

2.98

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

quartz

Anhydrite

Gems & Gemology Fall 2000 p262

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

Anhydriet

Faraday mine

Bancroft district

Ontario

Canada

The Photo-Atlas of Minerals, Los Angeles County Museum of Natural History, CD-ROM 1998

Anhydriet

Hormuz Island (Jazireh-ye Hormoz; Ormuz Island; Jezirat Hormuz; Hormoz)

Hormozgan

 

Iran

Minealien Welt 1/2002

Anhydriet

Simplontunnel

Simplon

Wallis

Zwitserland

Minerals and their Localities, Jan H.Bernhard and Jaroslav Hyrsi, 2004