Cubic Zirconia
Cubic Zirconia · Round Brilliant
Very Good Cut
Carat
6.5 carats (Calculated from 1.3 grams weight; note that diamond would weigh approx 1.3 carats at this physical volume, but 1.3g weight for an 11mm stone confirms higher density material like Cubic Zirconia)
Color
D (Colorless)
Clarity
IF (Internally Flawless)
Shape
Round Brilliant
Overall Assessment
The stone is a high-quality Cubic Zirconia simulant rather than a genuine diamond, evidenced by its physical weight of 1.3 grams (6.5 carats equivalent density) at 11 mm diameter, combined with excessive fire and dispersion.
Cut Quality
Very Good
Brilliance
High white light return, though differing slightly in dispersion characteristics compared to a natural diamond.
Fire
Strong dispersion of spectral colors, noticeably higher fire (rainbow flashes) than a genuine diamond.
Scintillation
Good play of light and dark areas as the stone moves, though lacks the specific patterning of an ideal cut diamond.
Proportions
Standard modern round brilliant proportions with medium to slightly thick girdle and a moderate table percentage.
Symmetry
Good
Polish
Good
Fluorescence
None
Inclusions
None visible under 10x magnification, typical of synthetic simulants.
Blemishes
Minor surface abrasions on facet junctions from handling.
Origin
Laboratory-created synthetic material (Cubic Zirconia)
Treatment Detection
No treatments applied; synthesized in a laboratory setting.
Estimated Value
$20 - $100 USD (Synthetic Simulant Market)
Certification Estimate
Not typically certified by major labs like GIA or AGS due to being a simulant; would receive identification reports from general gemological laboratories.
Investment Potential
Poor. Cubic Zirconia and synthetic simulants do not retain resale value or appreciate over time.
Similar Diamonds
Comparable to high-grade synthetic diamond simulants or high-end CZ stones.
Setting Suggestions
Classic 4-prong or 6-prong solitaire setting in sterling silver, white gold, or platinum.
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh chemicals and ultrasonic cleaners if mounted in plated jewelry.
Interesting Facts
Cubic Zirconia has a specific gravity roughly 1.7 times that of a diamond, which is why an 11 mm stone weighing 1.3 grams points directly to CZ rather than diamond.
Notes
It weighs 1.3 grams and is 11 mm in diameter