Report · 1bb30ecf-8fda-4001-81a7-15d5beffc745
Gemstone Identification Report #073-2026
Iolite, Cordierite — —
Issued
03/03/2026
Olena Rybnikova, PhD · GIA
Origin
—
Species
Iolite, Cordierite
Specimen
—
Variety
Oval
Weight
0.870 ct
Dimensions
7.5 x 6.0 x 3.5
R.I.
1.540 - 1.550
D.R.
0.010
Pleo.
Strong yellow - violet - light blue
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
Weak red
Microscope
Fingerprint, black short prism crystal inclusions.
Treatment
Untreated
Report · 1bb30ecf-8fda-4001-81a7-15d5beffc745
Gemstone Identification Report #073-2026
Iolite, Cordierite — —
Issued
03/03/2026
Olena Rybnikova, PhD · GIA
Origin
—
Species
Iolite, Cordierite
Specimen
—
Variety
Oval
Weight
0.870 ct
Dimensions
7.5 x 6.0 x 3.5
R.I.
1.540 - 1.550
D.R.
0.010
Pleo.
Strong yellow - violet - light blue
Fluor. LW
LW (365 nm) - inert
Fluor. SW
SW (254 nm) - inert
Chelsea
Weak red
Microscope
Fingerprint, black short prism crystal inclusions.
Treatment
Untreated
No description provided.