Not a diamond; this gemstone appears to be a blue sapphire or a synthetic blue spinel set in a ring.
Not a diamond; this gemstone appears to be a blue sapphire or a synthetic blue spinel set in a ring. · Cushion / Rectangular step cut with rounded corners
Good Cut
Carat
Estimated at approximately 1.50 to 2.50 carats based on visual dimensions
Color
Rich vibrant blue (Fancy Dark Blue to Medium Blue depending on lighting)
Clarity
Eye-clean (Estimated VS1 equivalent for colored stones)
Shape
Cushion / Rectangular step cut with rounded corners
Overall Assessment
An attractive blue gemstone in a classic bezel-set ring mounting. While commonly mistaken for a blue diamond due to color, gemological testing is recommended to confirm species (corundum vs. synthetic spinel/glass) and treatment status.
Cut Quality
Good
Brilliance
Moderate vitreous luster characteristic of corundum
Fire
Low to moderate dispersion (typical for sapphires)
Scintillation
Good flash effect with broad facet reflection patterns
Proportions
Standard cushion proportions with medium depth and well-defined table
Symmetry
Good with balanced facet alignment
Polish
Good smooth surface finish visible
Fluorescence
Inert to Faint
Inclusions
No major visible inclusions detected at this magnification; possibly minor silk or needles under microscopic examination
Blemishes
Minor surface wear consistent with a pre-owned bezel-set ring
Origin
Likely of terrestrial metamorphic origin (such as Sri Lanka, Madagascar, or Burma) or laboratory-created Verneuil process if synthetic
Treatment Detection
Standard thermal enhancement (heat treatment) is common for blue sapphires; microscopic testing needed to confirm absence of diffusion or flux healing
Estimated Value
$500 to $2,500 depending on whether it is a natural heat-treated sapphire, untreated fine sapphire, or synthetic substitute
Certification Estimate
GIA or AGL for colored gemstone origin and treatment analysis
Investment Potential
Moderate for fine untreated natural sapphires; low for synthetic or heavily treated stones
Similar Diamonds
Not applicable as this is a colored gemstone, but comparable to medium-high quality blue sapphires or synthetic spinels
Setting Suggestions
Bezel setting in yellow or white gold, which securely holds the gemstone and complements vintage or signet-style ring mountings
Care & Maintenance
Clean with warm soapy water and a soft brush; avoid harsh ultrasonic cleaners if fractures or fillings are present
Interesting Facts
Blue sapphires have historically been associated with royalty and nobility, symbolizing wisdom, virtue, and good fortune