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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

Cinnabar

 

 

 

 

8.25

8.25

orangy red

Hunan Province, China

19.87ct, transparent

 

 

 

 

broad absorption below 615nm

inert

inert

GIA Gem Database  35514

Cinnabar

 

 

 

 

8.24

8.24

dark red

Hunan Province, China

20.52ct

 

 

 

 

broad absorption below 615nm

inert

inert

GIA Gem Database  35521

 

TABLES

Stone

RI min

RI max

Biref min

Biref max

Dens min

Dens max

ne min

ne max

no min

no max

Reference

Cinnabar

2.905

3.256

0.351

0.351

8.09

8.09

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

Cinnabar

2.905

3.256

0.351

0.351

8.09

8.1

3.256

3.256

2.905

2.905

http://www.geminterest.com 

Cinnabar

2.905

3.256

0.351

0.351

8.09

8.09

3.256

3.256

2.905

2.905

Joel Arem, Color Encyclopedia of Gemstones, 1987 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Cinnabar

red

band theory : metalloid semi-conductor

http://toutsurlesgrenats.free.fr

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA