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

Triphylite

1,685

1,693

0,008

0,008

3,53

3,53

brown

Brazil

1.22ct

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2008 Dec, p118

Triphylite

1,687

1,7

0,007

0,008

3,52

3,57

dark orangy red, slight colour change from greenish brown in daylight to brownish pink or purple

Galileia, Minas Gerais, Brazil

0.26-9.31ct

1,687

1,692

1,689

1,695

1,695

1,700

410, 450-460nm, strong lines near 470, bands at 490-500 and 600

inert

inert

Gems & Gemology 2009 Fall, p229-230

Triphylite

1,688

1,693

0,005

0,005

3,5

3,5

greenish-brown

Conselheiro Pena, Minas Gerais, Brazil

1,688

1,688

1,689

1,689

1,693

1,693

Zeitschrift der Deutschen Gemmologischen Gesellschaft 1993 Sep, p66

Triphylite

1,689

1,695

0,006

0,006

3,4

3,4

greyish brown

0.65ct

1,689

1,689

1,691

1,691

1,695

1,695

strong line at 410, weak at 425, moderate band at 450-460, line at 470, band at 485-498, weak band at 540-590nm

inert

inert

Gems & Gemology 1988 fall p 170

Triphylite

1,69

1,696

0,006

0,006

3,52

3,52

colour-change yellow green to greenish yellow (daylight) to yellowish orange or brownish orange (incandescent light)

Brazil

0.23 to 1.93ct, 67.5 % triphylite - 32.5% lithiophylite

1,690

1,690

1,691

1,691

1,696

1,696

The Australian Gemmologist 2011 Vol 24, N°5, p104-105

Triphylite

1,67

3,38

3,38

orange

cabochon, 4,66ct, translucent, spot RI

iigj lab information circular 2018 Vol 76, july 2018

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

Triphylite

1.663

1.702

0.005

0.006

3.35

3.6

1.663

1.696

1.673

1.702

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Triphylite

1.674

1.701

0.005

0.01

3.4

3.6

Gemmo.eu 

Triphylite

1.689

1.702

0.006

0.008

3.34

3.58

1.689

1.694

1.689

1.695

1.695

1.702

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Triphylite

1.689

1.702

0.006

0.008

3.34

3.58

http://www.gemmology.be 

Triphylite

1.689

1.702

0.006

0.008

3.34

3.58

1.689

1.694

1.689

1.695

1.695

1.702

http://www.geminterest.com 

Triphylite

1.689

1.702

0.006

0.008

3.42

3.52

1.689

1.694

1.695

1.702

Gems, R Webster, 5th edition 1994 

Triphylite

1.689

1.702

0.006

0.008

3.34

3.58

1.689

1.694

1.689

1.695

1.695

1.702

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

Triphylite

1.689

1.702

0.006

0.008

3.34

3.58

Gemology Tools Professional 2010

STONE

LOCALITIES

REFERENCE

Triphylite

Galiléia, Governador Valadares, Rio doce

Minas Gerais

Brazil

Gems & Gemology 2009 Fall, p229-230