Report · fcb1b31c-e9d5-4859-9a23-d9865e9a3871

Gemstone Identification Report #081-2026

Diamond Laboratory Grown — —

Issued

07/04/2026

Olena Rybnikova, PhD · GIA

Spectrum reveals a completely featureless visible-NIR profile with no nitrogen-related absorption, consistent with a Type IIa or low-nitrogen HPHT synthetic diamond.

Spectrum confirms a well-crystallised diamond lattice (sharp 1332 cm⁻¹ peak, no sp² carbon bands), with a low-wavenumber shoulder at ~1320–1325 cm⁻¹ indicative of localised lattice strain associated with HPHT growth conditions.

Origin

High Pressure High Temperature (HPHT) growth process. Type IIa

Species

Diamond Laboratory Grown

Specimen

—

Variety

Oval Brilliant

Weight

1.090 ct

Dimensions

8.22 x 5.95 x 3.59

R.I.

OTL

S.G.

3.37

D.R.

Not applicable

Pleo.

Not applicable

Fluor. LW

LW (365 nm) - inert

Fluor. SW

SW (254 nm) - strong greenish blue with extremely strong blue phosphorescence.

Microscope

Laser inscription LG772671921 No inclusions spotted.

Treatment

No post-growth treatment

Origin

High Pressure High Temperature (HPHT) growth process. Type IIa

Report · fcb1b31c-e9d5-4859-9a23-d9865e9a3871

Gemstone Identification Report #081-2026

Diamond Laboratory Grown — —

Issued

07/04/2026

Olena Rybnikova, PhD · GIA

Origin

High Pressure High Temperature (HPHT) growth process. Type IIa

Species

Diamond Laboratory Grown

Specimen

—

Variety

Oval Brilliant

Weight

1.090 ct

Dimensions

8.22 x 5.95 x 3.59

R.I.

OTL

S.G.

3.37

D.R.

Not applicable

Pleo.

Not applicable

Fluor. LW

LW (365 nm) - inert

Fluor. SW

SW (254 nm) - strong greenish blue with extremely strong blue phosphorescence.

Microscope

Laser inscription LG772671921 No inclusions spotted.

Treatment

No post-growth treatment

Origin

High Pressure High Temperature (HPHT) growth process. Type IIa

IGI original report #LG772671921 available