Data Depository: Gemmological Properties, Modal Proportions and Petrographic Names of Myanmar Jade
Samples
Franz L., Tay Thye Sun, Hänni H.A., de Capitani C., Thanasuthipitak T. and Atichat W., 2014. A comparative study of
jadeite, omphacite and kosmochlor jades from Myanmar, and suggestions for a practical nomenclature. Journal of
Gemmology, 34(3), pp. 210-229, http://dx.doi.org/10.15506/JoG.2014.34.3.210.
Jadeitites with Kosmochlor and Clinoamphibole
Sample
Gemmological data
1J02
RI: spot 1.65
SG: 3.16
Absorption spectrum: none
Colour: blackish green
Texture: fine to medium granular
RI: spot 1.65
SG: 3.25
Absorption spectrum: none
Colour: blackish green
Texture: medium to coarse granular
RI: spot 1.67
SG: 3.23
Absorption spectrum: none
Colour: dark green
Texture: long fibrous <2 mm
RI: spot 1.65
SG: 3.09
Absorption spectrum: none
Colour: medium-light green with spotted
green
Texture: medium granular to fibrous
RI: spot 1.66
SG: 3.30
Absorption spectrum: none
Colour: green spots/veins
Texture: fine to medium fibrous/granular
RI: spot 1.64
SG: 3.34
Absorption spectrum: no 437 nm
Colour: greyish black
Texture: fine to medium fibrous
RI: spot 1.64
SG: 3.22
Absorption spectrum: no 437 nm
Colour: opaque dull green
Texture: medium granular to fibrous
1J04
1J07
1J14
2J17
4J11
4J12
4J19
RI: spot 1.66
SG: 3.15
Absorption spectrum: no 437 nm
Colour: brownish-yellow, opaque
Texture: medium fibrous
4J22
RI: spot 1.63
SG: 3.68
Absorption spectrum: no 437 nm
Colour: white with green colour veins
Texture: medium fibrous
Modal proportion
(vol.% estimated)
Petrographic name
Jadeite: 60%
Clinoamphibole: 39%
Kosmochlor: 1%
Kosmochlor-bearing
clinoamphibole-jadeite schist
Jadeite and chromian
jadeite: 65%
Clinoamphibole: 35%
Kosmochlor: <1%
Accessories: <1%
Jadeite: 75%
Clinoamphibole: 25%
Kosmochlor: <1%
Accessories: <1%
Kosmochlor-bearing
clinoamphibole-jadeite schist
Jadeite: 65%
Kosmochlor: 25%
Clinoamphibole: 10%
Chromite: <1%
Kosmochlor-clinoamphibole
jadeitite
Jadeite and chromian
jadeite: 60%
Clinoamphibole: 25%
Kosmochlor: 15%
Chromite: <1%
Jadeite and chromian
jadeite: 99%
Kosmochlor: <1%
Accessories: 1%
Kosmochlor-clinoamphibole
jadeitite
Jadeite, chromian
jadeite and omphacite:
95%
Phlogopite: 3%
Kosmochlor: 1%
Clinoamphibole: 1%
Opaque phase: <1%
Jadeite: 65%
Clinoamphibole: 35%
Kosmochlor: <1%
(strongly variable from
layer to layer)
Kosmochlor-clinoamphibolebearing phlogopiteomphacite-jadeite schist
Jadeite and chromian
jadeite: 94%
Phlogopite: 3%
Clinoamphibole: 2%
Kosmochlor: <1%
Accessories: 1%
(strongly variable from
layer to layer)
Kosmochlor-bearing
phlogopite-clinoamphibolejadeite schist
Kosmochlor-bearing
clinoamphibole jadeitite
Kosmochlor-analcimefeldspar-clinoamphibolebearing jadeitite
Kosmochlor-bearing
clinoamphibole-jadeite schist
Jadeitites with Clinoamphibole
Sample
Gemmological data
1J11
RI: spot 1.66
SG: 3.23
Absorption spectrum: no 437 nm
Colour: light green with dark stripe
Texture: fine to medium granular
RI: spot 1.66
SG: 3.22
Absorption spectrum: no 437 nm
Colour: light green with dark stripe
Texture: fine to medium granular
RI: spot 1.66
SG: 3.22
Absorption spectrum: no 437 nm
Colour: dark green with black veins
Texture: fine to medium fibrous and
granular
RI: spot 1.66
SG: 3.30
Absorption spectrum: 437 nm
Colour: light green with lavender colours
Texture: medium granular
RI: spot 1.66
SG: 3.18
Absorption spectrum: no 437 nm
Colour: dull green patches with brown
corroded edges
Texture: medium granular
RI: spot 1.66
SG: 3.24
Absorption spectrum: 437 nm
Colour: pale greyish green with dark
green veins
Texture: medium to coarse fibrous
RI: spot 1.65
SG: 3.31
Absorption spectrum: 437 nm
Colour: light green patches with brown
staining
Texture: medium fibrous
RI: spot 1.65
SG: 3.35
Absorption spectrum: 437 nm
Colour: light dull green
Texture: coarse fibrous
1J12
2J16
2J19
4J01
4J03
4J09
4J30
Modal proportion
(vol.% estimated)
Petrographic name
Jadeite: 65%
Clinoamphibole: 35%
Accessories: <1%
Clinoamphibole-jadeite
schist
Jadeite and chromian
jadeite: 80%
Clinoamphibole: 20%
Accessories: <1%
Clinoamphibole-jadeite
schist
Jadeite and chromian
jadeite: 60%
Clinoamphibole: 40%
Accessories: <1%
Clinoamphibole-jadeite
schist
Jadeite: 99%
Accessories: <1%
Clinoamphibole-bearing
jadeitite
Jadeite: 90%
Clinoamphibole: 10%
Accessories: <1%
Clinoamphibole-jadeite
schist
Jadeite: 80%
Clinoamphibole: 20%
Accessories: <1%
Clinoamphibole jadeitite
Jadeite: 97%
Clinoamphibole: 3%
Accessories: <1%
Clinoamphibole jadeitite
Jadeite and
omphacite: >97%
Clinoamphibole: 2%
Accessories: <1%
Biotite-bearing
clinoamphibole-omphacite
jadeitite
Albite-bearing Jadeitites
Sample
1J05
2J18
Gemmological data
RI: spot 1.66
SG: 3.34
Absorption spectrum: 437 nm
Colour: dull green with specks of white
spots
Texture: fine to medium granular
RI: spot 1.66
SG: 3.27
Absorption spectrum: 437 nm
Modal proportion
(vol.% estimated)
Petrographic name
Jadeite and omphacite:
99%
Accessories: <1%
Albite-bearing omphacite
jadeitite
Jadeite: >99%
Accessories: <1%
Albite-bearing jadeite schist
4J27
Colour: white with green veins
Texture: fine to medium fibrous
RI: spot 1.66
SG: 3.34
Absorption spectrum: 437 nm
Colour: brownish spots, opaque
Texture: medium fibrous
Jadeite and omphacite:
~100%
Accessories: <1%
Albite-bearing omphacite
jadeitite
Jadeitites
Sample
Gemmological data
1J03
RI: spot 1.65
SG: 3.30
Absorption spectrum: no 437 nm
Colour: blackish green
Texture: fine to medium granular <1 mm
RI: spot 1.65
SG: 3.27
Absorption spectrum: no 437 nm
Colour: white with green veins
Texture: fine to medium granular
RI: spot 1.66
SG: 3.35
Absorption spectrum: 437 nm
Colour: pale green, very translucent
Texture: fine to medium fibrous
RI: spot 1.65
SG: 3.35
Absorption spectrum: 437 nm
Colour: pale green
Texture: fine to medium granular
RI: spot 1.65
SG: 3.34
Absorption spectrum: 437 nm
Colour: medium-light lavender
Texture: medium to coarse granular
RI: spot 1.66
SG: 3.31
Absorption spectrum: 437 nm
Colour: light green with brown skin
Texture: medium granular
RI: spot 1.66
SG: 3.35
Absorption spectrum: 437 nm
Colour: light yellow, translucent
Texture: fine to medium fibrous
RI: spot 1.66
SG: 3.34
Absorption spectrum: 437 nm
Colour: pale green with brown staining,
translucent.
Texture: fine to medium granular
RI: spot 1.66
SG: 3.27
Absorption spectrum: no 437 nm
Colour: spotted green with white
Texture: medium granular / fibrous
RI: spot 1.65
SG: 3.34
Absorption spectrum: no 437 nm
Colour: light grey with spotted black
Texture: fine to medium fibrous
RI: spot 1.66
1J06
1J09
1J13
2J03
2J07
2J12
4J04
4J06
4J10
4J13
Modal proportion
(vol.% estimated)
Petrographic name
Jadeite: >99%
Accessories: <1%
Jadeitite
Jadeite: 100%
Jadeite schist
Jadeite: >99%
Accessories: <1%
Jadeitite
Jadeite: >99%
Accessories: <1%
Jadeitite
Jadeite: >99%
Accessories: <1%
Jadeitite
Jadeite: >99%
Omphacite: <1%
Omphacite-bearing jadeitite
Jadeite: >99%
Accessories: <1%
Jadeite schist
Jadeite: 92%
Vesuvianite: 7%
Accessories: 1%
Amphibole-bearing
vesuvianite jadeitite
Jadeite: >96%
Omphacite: 2%
Analcime: <1%
Accessories: <1%
Analcime-bearing
omphacite jadeitite
Jadeite: ~100%
Accessories: <1%
Jadeitite
Jadeite: 98%
Analcime-phlogopite-
4J21
4J26
4J28
SG: 3.28
Absorption spectrum: no 437 nm
Colour: light greyish green with brown
staining skin
Texture: medium granular
RI: spot 1.62
SG: 3.33
Absorption spectrum: 437 nm
Colour: dark dull green
Texture: medium to coarse fibrous
RI: spot 1.65
SG: 3.28
Absorption spectrum: no 437 nm
Colour: Dull green with brown staining
Texture: fine fibrous
RI: spot 1.66
SG: 3.35
Absorption spectrum: 437 nm
Colour: dull green
Texture: fine to medium fibrous
Phlogopite: <1%
Analcime: <1%
Accessories: <1%
bearing jadeite mylonite
Jadeite: ~100%
Accessories: <1%
Jadeitite
Jadeite: >98%
Omphacite: <2%
Omphacite-jadeite schist
Jadeite: 100%
Jadeitite
Omphacitites
Sample
Gemmological data
J270
RI: spot 1.68
SG: 3.36
Absorption spectrum: no 437 nm
Colour: very dark green with whitish vein
Texture: fine grained
RI: spot 1.67
SG: 3.26
Absorption spectrum: no 437 nm
Colour: brownish ‘flower-like’ stains with
green parallel veins
Texture: fine grained, fibrous
RI: spot 1.67
SG: 3.33
Absorption spectrum: no 437 nm
Colour: very dark green veins
Texture: fine grained
RI: spot 1.67
SG: 3.33
Absorption spectrum: no 437 nm
Colour: dark patches of green with iron
oxides in fissures
Texture: fine grained
RI: spot 1.67
SG: 3.33
Absorption spectrum: no 437 nm
Colour: dark green with spots of whitish
inclusion
Texture: fine grained
J271
J272
J273
J274
Modal proportion
(vol.% estimated) or
Raman spectra ID
Raman spectra
Petrographic name
Omphacitite
Omphacite: 100%
No accessories
Omphacite schist
Raman spectra
Omphacitite
Raman spectra
Omphacitite
Omphacite: 100%
No accessories
Omphacitite