Gemsdat
 

                Home            Gemstones

 

INVESTIGATIONS

Stone

RI min

RI max

Dens min

Dens max

Colour

Location

Info

Spectrum

UVS

UVL

Reference

Tektite - Libyan desert glass

1.46

1.46

2.22

2.22

light yellow

Egypt

4.49ct

 

inert

inert

ACAM lab  3978

Tektite - Libyan desert glass

1.465

1.465

2.21

2.21

light yellow

Egypt

52.35ct cabochon

 

inert

inert

ACAM lab  4889

Tektite - Darwin glass

1.478

1.482

2.25

2.52

pale to dark green

Mt Darwin, Tasmania, Australia

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 1997 Mar, p7-12

Tektite - Moldavite

1.481

1.482

2.341

2.341

green

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2015 Dez, p403-409

Tektite - Moldavite

1.482

1.482

2.31

2.31

green

Czech Republic

7.6ct

 

inert

inert

ACAM Lab  4167

Tektite - Moldavite

1.488

1.49

2.356

2.356

green

 

 

 

 

 

Gemmologie, Zeitschrift der Deutschen Gemmologischen Gesellschaft 2015 Dez, p403-409

Tektite - Moldavite

1.49

1.49

2.34

2.34

green

Czech Republic

21.55ct

 

inert

inert

ACAM Lab  827

 

TABLES

Stone

RI min

RI max

Dens min

Dens max

Reference

Tektite - Libyan desert glass

1.459

1.464

2.19

2.22

Gemmo.eu 

Tektite - Libyan desert glass

1.46

1.465

2.2

2.22

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

Tektite - Moldavite

1.46

1.6

2.21

2.96

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

Tektite - Libyan desert glass

1.46

1.46

2.2

2.2

Gemology Tools Professional 2010

Tektite

1.46

1.54

2.21

2.96

Gemology Tools Professional 2010

Tektite

1.462

1.543

2.21

2.96

http://www.gemmology.be 

Tektite - Libyan desert glass

1.462

1.462

2.21

2.21

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Moldavite

1.468

1.503

2.32

2.4

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Tektite - Darwin glass

1.47

1.482

2.26

2.26

Gemmological Tables, Ulrich Henn, 2004 

Tektite - Darwin glass

1.47

1.48

2.75

2.96

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Darwin glass

1.47

1.48

2.75

2.96

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

Tektite - Bediasite

1.48

1.51

2.33

2.43

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Bediasite

1.48

1.51

2.33

2.43

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

Tektite - Moldavite

1.48

1.49

2.3

2.5

John Sinkakas, Gemstone and mineral data book,1972 

Tektite - Moldavite

1.48

1.54

2.27

2.4

http://www.geminterest.com 

Tektite - Moldavite

1.48

1.54

2.27

2.4

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Moldavite

1.48

1.54

2.34

2.39

Gems, R Webster, 5th edition 1994 

Tektite - Moldavite

1.48

1.54

2.27

2.4

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

Tektite - Moldavite

1.48

1.51

2.32

2.4

Gemology Tools Professional 2010

Tektite - Georgia tektite/ Massachussetts tektite

1.485

1.485

2.33

2.33

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Georgia tektite/ Massachussetts tektite

1.485

1.485

2.33

2.34

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

Tektite - Indochinite

1.49

1.51

2.4

2.44

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Indochinite

1.49

1.51

2.4

2.44

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

Tektite - Moldavite

1.49

1.51

2.36

2.44

Bestimmungstabellen für Edelsteine, Birgit Günther, 1981 

Tektite - Moldavite

1.49

1.51

2.36

2.44

Gemmological Tables, Ulrich Henn, 2004 

Tektite - Australite

1.5

1.52

2.38

2.46

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Australite

1.5

1.52

2.38

2.46

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

Tektite - Ivory Coast tektite

1.5

1.52

2.4

2.51

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Ivory Coast tektite

1.5

1.52

2.4

2.51

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

Tektite - Javaite

1.509

1.509

2.43

2.45

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Javaite

1.509

1.509

2.43

2.45

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

Tektite - Billitonite

1.51

1.53

2.46

2.51

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Billitonite

1.51

1.53

2.46

2.51

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

Tektite - Philippinite

1.513

1.513

2.44

2.45

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Tektite - Philippinite

1.513

1.513

2.44

2.45

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

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Tektite

brown

Fe³+ in octahedral coordination

Gems & Gemology Summer 1988

Tektite - Moldavite

green

Fe²+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

anatase

Tektite - Libyan desert glass

http://www.b14643.de/Sahara/LDG/index.htm

anhydrite

Tektite - Libyan desert glass

http://www.b14643.de/Sahara/LDG/index.htm

aragonite

Tektite - Libyan desert glass

http://www.b14643.de/Sahara/LDG/index.htm

cristobalite

Tektite - Libyan desert glass

http://www.b14643.de/Sahara/LDG/index.htm

rutile

Tektite - Libyan desert glass

http://www.b14643.de/Sahara/LDG/index.htm

zircon

Tektite - Libyan desert glass

http://www.b14643.de/Sahara/LDG/index.htm

 

LOCALITIES

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

MgO

FeO

TiO2

CaO

Na2O

Cr2O3

Fe2O3

K2O

CuO

Tektite - Darwin glass

green

Tasmania

Australia

Gemmologie, Zeitschrift der deutschen gemmologischen Gesellschaft, 1996, Mar, p11

85.3

8.4

 

2.28

0.74

 

 

 

 

2.06

1.23

Tektite - Indochinite

 

 

Thailand

The Journal of Gemmology 2000, Vol 27, N°5,p282

75.13

12.93

0.96

 

0.61

2.32

0.29

0.15

5.09

2.51

 

Tektite - Moldavite

 

 

 

The Journal of Gemmology 2000, Vol 27, N°5,p282

76.59

9.8

2.07

 

0.27

5.22

 

0.29

1.75

4.02