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

anorthoclase

1,518

1,531

0,007

0,008

2,59

2,62

near colourless to yellow, brownish grey

Dong Nai Province, Vietnam

1,48-25,99 ct

1,518

1,523

1,526

1,531

inert to weak pink

inert

Gems & Gemology 2024 Summer p199

anorthoclase

1,531

1,538

0,007

0,007

2,66

2,66

black

Antarctica

2.29 ct and 1.61ct

The Journal of Gemmology 2019 Vol 36, N°5, p402