Report · 5223c926-6f03-4a33-a032-bc2dedd94c5a

Gemstone Identification Report #086-2026

Topaz — —

Issued

14/04/2026

Olena Rybnikova, PhD · GIA

The spectrum shows strong absorption in the red-to-infrared region, with transmission in light blue, green, and yellow regions. The major absorption bands are due to aluminum vacancies. See the Mineral Spectroscopy Server (http://minerals.gps.caltech.edu/FILES/Visible/topaz/Index.html) for comparison.

Raman spectroscopy confirms the identification of the stone as topaz (Al₂SiO₄(F,OH)₂). See the RRUFF database (https://www.rruff.net/) for comparison.

Origin

Volyn deposit, Khoroshiv Raion, Zhytomyr Oblast, Ukraine

Species

Topaz

Specimen

—

Variety

Cushion modified / brilliant

Weight

4.830 ct

Dimensions

8.0 x 8.0 x 5.2

R.I.

1.611 - 1.620

S.G.

3.53

D.R.

0.009

Pleo.

Moderate light greenish-blue to colorless and light yellow

Fluor. LW

LW (365 nm) - inert

Fluor. SW

SW (254 nm) - weak green

Chelsea

No reaction

Microscope

1. Liquid inclusions in planes creating feathers. 2. Internally flawless.

Treatment

Untreated

Origin

Volyn deposit, Khoroshiv Raion, Zhytomyr Oblast, Ukraine

Report · 5223c926-6f03-4a33-a032-bc2dedd94c5a

Gemstone Identification Report #086-2026

Topaz — —

Issued

14/04/2026

Olena Rybnikova, PhD · GIA

Origin

Volyn deposit, Khoroshiv Raion, Zhytomyr Oblast, Ukraine

Species

Topaz

Specimen

—

Variety

Cushion modified / brilliant

Weight

4.830 ct

Dimensions

8.0 x 8.0 x 5.2

R.I.

1.611 - 1.620

S.G.

3.53

D.R.

0.009

Pleo.

Moderate light greenish-blue to colorless and light yellow

Fluor. LW

LW (365 nm) - inert

Fluor. SW

SW (254 nm) - weak green

Chelsea

No reaction

Microscope

1. Liquid inclusions in planes creating feathers. 2. Internally flawless.

Treatment

Untreated

Origin

Volyn deposit, Khoroshiv Raion, Zhytomyr Oblast, Ukraine

No description provided.