Likely Simulant (Cubic Zirconia or Yellow Quartz/Citrine)
Likely Simulant (Cubic Zirconia or Yellow Quartz/Citrine) · Radiant cut center stone with pear-shaped side accents
Good Cut

Carat
Estimated 2.5 to 3.0 carats (center stone)
Color
Fancy Intense to Fancy Vivid Yellow (simulated)
Clarity
Visually eye-clean, likely equivalent to IF-VVS (simulated)
Shape
Radiant cut center stone with pear-shaped side accents
Overall Assessment
The piece appears to be a high-quality fashion ring featuring a large radiant-cut yellow simulant. While it mimics the look of a rare Fancy Vivid Yellow diamond, the light dispersion and facet sharpness suggest it is a synthetic simulant.
Cut Quality
Good
Brilliance
High white light reflection consistent with simulated material
Fire
Very high; rainbow-like dispersion characteristic of Cubic Zirconia
Scintillation
Broad flash pattern typical of radiant cuts
Proportions
Standard radiant proportions with slightly high crown
Symmetry
Good
Polish
Good
Fluorescence
Indeterminate from image; typical simulants show none or inert
Inclusions
No visible internal inclusions at this magnification; typical of high-grade simulants
Blemishes
Minor surface wear visible on facet junctions
Origin
Synthetic/Man-made
Treatment Detection
N/A - synthetic material
Estimated Value
$50 - $200 USD (assuming costume jewelry/simulant)
Certification Estimate
Unlikely to be certified by GIA; would likely be labeled as a stimulant by smaller labs
Investment Potential
Low; primarily decorative/fashion value
Similar Diamonds
Fancy Vivid Yellow Natural Diamonds or Lab-Grown Yellow Radiants
Setting Suggestions
Current yellow gold-tone prongs complement the yellow center; would look elegant in 18k yellow gold
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals
Interesting Facts
The radiant cut was the first square cut to have a complete brilliant facet pattern on both the crown and pavilion