Gemsdat
 

                Home            Gemstones

 

     

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

Pectolite -larimar-

1.59

1.63

 

 

2.62

2.87

turquoise-blue, light greenish blue

Dominican Republic

hardness over 5 to 6 (because of fibrous structure)

 

 

 

 

 

 

 

green

blue: moderate chalky green; green : yellow

Gems & Gemology 1989 winter p216-225

Pectolite

1.592

1.645

 

 

2.91

2.91

colourless

Mont Saint-Hilaire, Quebec, Canada

 

1.592

1.610

1.603

1.615

1.630

1.645

 

weak pink

may be pink, orange-pink

The Journal of Gemmology 1996 Vol 25, N°1,p36

Pectolite -larimar-

1.6

1.6

 

 

2.83

2.83

light blue

Dominican Republic

1.17ct, cabochon

 

 

 

 

 

 

none

yellow

orange

ACAM Lab  4892

 

TABLES

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

Pectolite

1.591

1.646

0.034

0.038

2.82

2.92

 

 

 

 

 

 

Gemmo.eu 

Pectolite

1.592

1.645

0.032

0.038

2.74

2.9

1.592

1.610

1.603

1.615

1.630

1.645

Gemmological Tables, Ulrich Henn, 2004  

Pectolite

1.595

1.645

0.032

0.038

2.74

2.9

1.592

1.610

1.603

1.615

1.630

1.645

Bestimmungstabellen für Edelsteine, Birgit Günther, 2008 

Pectolite

1.595

1.646

0.033

0.037

2.74

2.89

1.595

1.610

 

 

1.632

1.646

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

Pectolite

1.595

1.645

0.036

0.036

2.74

2.88

 

 

 

 

 

 

http://www.gemmology.be 

Pectolite

1.595

1.633

0.038

0.038

2.74

2.88

 

 

 

 

 

 

Tabellen zur Edelstein-Bestimmung, Pschichholz FGA, 1975 

Pectolite

1.595

1.645

0.036

0.036

2.74

2.88

1.595

1.610

1.605

1.615

1.632

1.645

Joel Arem, Color Encyclopedia of Gemstones, 1987 

Pectolite

1.595

1.645

0.029

0.038

2.74

2.88

1.595

1.610

1.605

1.615

1.632

1.645

http://www.geminterest.com 

Pectolite

1.595

1.633

0.038

0.038

2.62

2.88

 

 

 

 

 

 

Gems, R Webster, 5th edition 1994 

Pectolite

1.595

1.645

0.032

0.037

2.62

2.9

1.595

1.610

1.605

1.615

1.632

1.645

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

Pectolite

1.595

1.645

0.029

0.038

2.74

2.9

 

 

 

 

 

 

Gemology Tools Professional 2010

Pectolite

1.61

1.61

 

 

2.74

2.88

 

 

 

 

 

 

John Sinkakas, Gemstone and mineral data book,1972 

 

CAUSE OF COLOUR

Stone

Colour

Cause of colour

Reference

Pectolite

blue

Cu²+ in octahedral coordination

Gems & Gemology Summer 1988

 

MINERAL INCLUSIONS

Inclusion

Stone

Reference

calcite

Pectolite

Gems & Gemology 1989 winter p 216-225

chalcosite

Pectolite

Gems & Gemology 1989 winter p 216-225

copper

Pectolite

Gems & Gemology 1989 winter p 216-225

hematite

Pectolite

Gems & Gemology 1989 winter p 216-225

natrolite

Pectolite

Gems & Gemology 1989 winter p 216-225

 

LOCALITIES

 

CHEMICAL DATA (%)

Stone

Colour

Locality

Reference

SiO2

Al2O3

MnO

CaO

Na2O

K2O

CuO

P2O5

Pectolite

light blue

 

Dominican Republic

Gems & Gemology 1989 Winter p222

53.74

0.07

0.06

35.5

8.1

0.02

0.01

0.11

Pectolite

dark blue

 

Dominican Republic

Gems & Gemology 1989 Winter p222

52.36

0.04

 

36.27

8.13

0.02

0.03

0.11