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INVESTIGATIONS

Stone

RI min

RI max

Dens min

Dens max

Colour

Location

Info

Spectrum

UVS

UVL

Reference

HaŁyne

1.486

1.49

2.6

2.6

yellow-green

Oldoinyo Lengai Volcano, Tanzania

 

IR : 1364, 1499, 1412,1692, band 3600-3400

 

light orange

Gems & Gemology 2009 Fall, p200-203

HaŁyne

1.493

1.507

2.4

2.5

blue

Eifel, Germany

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1998 Jun, p92-93

HaŁyne

1.498

1.507

2.46

2.48

light blue to dark blue

Eifel, Germany

transparent to translucent

broad weak band in the yellow

inert to very weak red

inert to bright orange

Gems & Gemology 2000 Fall p246-253

HaŁyne

1.498

1.507

2.461

2.482

light blue to dark blue

Eifel, Germany

 

no clear bands; FTIR: bands 3593 and 3697

inert to weak red

inert to light orange

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2000 Jun, p103-114

HaŁyne

1.499

1.499

2.44

2.44

 

Badakhstan, Afghanistan

 

cutoff at 450nm, band at 600nm

very weak orange

moderate to strong orange

Gems & Gemology 2008 spring p80

HaŁyne

1.5

1.5

2.5

2.5

 

Eifel, Germany

0.13ct

none

strong orange

weak orange

ACAM lab  2046

HaŁyne

1.504

1.504

2.48

2.48

 

 

0.098ct - 0.152ct

 

dull red

inert to light orange

The Journal of Gemmology 1986 Vol 20, Nį1, p38

HaŁyne

1.506

1.506

2.47

2.47

violetish blue

Eifel Mts, Germany

1.00ct

broad absorption between 580-620nm

inert

inert

GIA Gem Database  35406

 

TABLES

Stone

RI min

RI max

Dens min

Dens max

Reference

HaŁyne

1.486

1.492

2.3

2.5

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

HaŁyne

1.49

1.507

2.44

2.5

Gemmological Tables, Ulrich Henn, 2004 

HaŁyne

1.49

1.509

2.4

2.52

http://www.geminterest.com 

HaŁyne

1.49

1.508

2.4

2.5

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

HaŁyne

1.495

1.504

2.4

2.55

Gemmo.eu 

HaŁyne

1.496

1.505

2.4

2.5

Joel Arem, Color Encyclopedia of Gemstones, 1987 

HaŁyne

1.496

1.496

2.4

2.4

John Sinkakas, Gemstone and mineral data book,1972 

HaŁyne

1.496

1.51

2.4

2.5

Bestimmungstabellen fŁr Edelsteine, Birgit GŁnther, 1981 

HaŁyne

1.496

1.51

2.4

2.5

Gemme, Dati per l'identificazione, P. De Stefano et al, 1993 

HaŁyne

1.496

1.505

2.4

2.5

http://www.gemmology.be 

HaŁyne

1.496

1.5

2.4

2.4

Gems, R Webster, 5th edition 1994 

HaŁyne

1.496

1.505

2.4

2.5

Gemology Tools Professional 2010

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

HaŁyne

blue

 ascribed to a color center associated with S3

Gems & Gemology Fall 2000 p246-253

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

apatite

HaŁyne

Gems & Gemology Fall 2000, p248

augite

HaŁyne

Gems & Gemology Fall 2000, p248

 

LOCALITIES

STONE

LOCALITIES

REFERENCE

HaŁyne

 

Mt Oldoinyo Lengai

Arusha Region

Tanzania

Gems & Gemology Fall 2009 p200

 

CHEMICAL DATA

Stone

Colour

Locality

Reference

SiO2

Al2O3

MgO

TiO2

CaO

Na2O

Fe2O3

K2O

P2O5

Cl

SO3

HaŁyne

yellow-green

Oldoinyo Lengai

Tanzania

Gems & Gemology 2009 Fall p202

34.01

28.91

0.09

0.02

4.47

19

0.3

1.57

0.13

 

 

HaŁyne

yellow-green

Oldoinyo Lengai

Tanzania

Gems & Gemology 2009 Fall p202

34.24

28.95

 

 

4.62

19.88

0.23

1.66

 

0.68

6.78