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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

dickite

1.55

1.58

 

 

 

 

orangy yellow

 

tianhuang, shadow IR, chinese stone seal

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 2017 Vol35, N6, p472

dickite

1.56

1.57

 

 

2.56

2.66

cream, red, grey, white

Saraburi, Thailand

a gem material for carving; translucent to opaque, aggregate

 

 

 

 

 

 

 

 

 

The Journal of Gemmology 2009 Vol31, N5-8, p211-225

dickite

1.56

1.57

 

 

2.57

2.68

greyish white, greyish yellow, brownish red

 

semitranslucent to opaque, RI : distant vision

 

 

 

 

 

 

 

inert to strong white

inert to strong white

The Journal of Gemmology 2010 Vol 32, N1-4, p68

 

TABLES

 

CAUSE OF COLOUR

 

MINERAL INCLUSIONS

 

LOCALITIES

 

CHEMICAL DATA (%)