Likely Lab-Grown or Synthetic Simulant
Likely Lab-Grown or Synthetic Simulant · Round Brilliant
Excellent Cut
Carat
4.20 Cts.
Color
D
Clarity
VVS1
Shape
Round Brilliant
Overall Assessment
The stone is presented as a high-quality D VVS1 Round Brilliant of significant size. However, the accompanying 'GOGTL' certificate is not a major international standard grading report, suggesting caution regarding the stone's natural status.
Cut Quality
Excellent
Brilliance
High, consistent with high-grade optical properties
Fire
Visible spectral dispersion typical of well-cut stones
Scintillation
Sharp and balanced light/dark patterns
Proportions
Measurements: 10.5 x 10.5 x 6.2 mm; Refractive Index: 2.418
Symmetry
Excellent (implied by cut grade)
Polish
Excellent (implied by cut grade)
Fluorescence
Not mentioned in certificate, visual appears None
Inclusions
VVS1 (Very Very Slightly Included) indicating minute inclusions visible under 10x magnification
Blemishes
Minimal to none visible on surface
Origin
Likely Lab-Grown given the perfect specs and certification type
Treatment Detection
No treatments listed; Refractive index listed at 2.418
Estimated Value
Depends on authentication of diamond type; if natural, multi-million dollar range; if lab-grown, $3,000-$6,000; if simulant, <$100
Certification Estimate
Certified by GO International Testing Lab (GOGTL); would likely require GIA or IGI for standard market verification
Investment Potential
Low for simulants/lab-grown; extremely high for natural stones of this grade/size
Similar Diamonds
Major branded lab-growths or high-carat top-tier natural stones
Setting Suggestions
A platinum or 18k white gold six-prong solitaire setting to accommodate the large 10.5mm diameter
Care & Maintenance
Ultrasonic cleaning and professional inspection every six months
Interesting Facts
The Refractive Index of 2.418 is slightly lower than the standard 2.417 for pure diamond, often seen in specific lab-grown or synthetic variations