Report · 218783f8-cb68-4b96-8e5c-b8d54fd1f155

Gemstone Identification Report #077-2026

Beryl var. Emerald — —

Issued

04/03/2026

Olena Rybnikova, PhD · GIA

The spectrum shows a typical chromium (Cr) absorption pattern, with two main bands in the blue-violet (~430 nm) and orange-red (~610 nm) regions, and a transmission window in the green (~500–530 nm) responsible for the characteristic green colour of the stone. See the Mineral Spectroscopy Server (http://minerals.gps.caltech.edu/FILES/Visible/Beryl/Index.html) for comparative reference spectra.

Raman spectroscopy confirms the identification of the stone as beryl Be₃Al₂(SiO₃)₆. See the RRUFF database (https://www.rruff.net/) for comparison.

Origin

Muzo, Boyacá Dept., Western Boyacá Province, Columbia

Species

Beryl var. Emerald

Specimen

—

Variety

Octagon / Step cut

Weight

0.450 ct

Dimensions

4.5 x 4.0 x 3.2 mm

R.I.

1.589 - 1.594

D.R.

0.005

Pleo.

Moderate bluish green to yellowish green

Fluor. LW

LW (365 nm) - weak yellow

Fluor. SW

SW (254 nm) - weak yellow

Chelsea

No reaction

Microscope

Black crystal inclusions, white calcite crystals inclusions, liquid inclusions, two-phase inclusions, feathers.

Treatment

Oil

Origin

Muzo, Boyacá Dept., Western Boyacá Province, Columbia

Report · 218783f8-cb68-4b96-8e5c-b8d54fd1f155

Gemstone Identification Report #077-2026

Beryl var. Emerald — —

Issued

04/03/2026

Olena Rybnikova, PhD · GIA

Origin

Muzo, Boyacá Dept., Western Boyacá Province, Columbia

Species

Beryl var. Emerald

Specimen

—

Variety

Octagon / Step cut

Weight

0.450 ct

Dimensions

4.5 x 4.0 x 3.2 mm

R.I.

1.589 - 1.594

D.R.

0.005

Pleo.

Moderate bluish green to yellowish green

Fluor. LW

LW (365 nm) - weak yellow

Fluor. SW

SW (254 nm) - weak yellow

Chelsea

No reaction

Microscope

Black crystal inclusions, white calcite crystals inclusions, liquid inclusions, two-phase inclusions, feathers.

Treatment

Oil

Origin

Muzo, Boyacá Dept., Western Boyacá Province, Columbia

No description provided.