Not a diamond; this gemstone appears to be an alexandrite or a color-change synthetic corundum/sapphire due to the distinct greenish-brown body color shifting to reddish hues at the edges and facets.
Not a diamond; this gemstone appears to be an alexandrite or a color-change synthetic corundum/sapphire due to the distinct greenish-brown body color shifting to reddish hues at the edges and facets. · Cushion Modified Brilliant
Very Good Cut
Carat
Estimated 2.5 to 3.5 carats based on visual perspective in the container.
Color
Fancy Greenish-Brown with reddish-orange color change phenomena.
Clarity
VS1 (Very Slightly Included)
Shape
Cushion Modified Brilliant
Overall Assessment
An eye-catching, beautifully colored cushion-cut color-change gemstone displaying a mesmerizing shift from green to reddish tones. Requires professional laboratory testing to confirm whether it is a natural Alexandrite (Chrysoberyl) or a lab-created variant.
Cut Quality
Very Good
Brilliance
Moderate brilliance due to deeper pavilion and absorption spectrum
Fire
Low to moderate dispersion compared to a diamond
Scintillation
Good flash effect with striking contrast zones between the green and red color play
Proportions
Medium to slightly thick girdle, moderate depth percentage around 65%
Symmetry
Good symmetry with slightly off-center culet alignment
Polish
Good polish with minor surface parallel lines visible
Fluorescence
Moderate red under long-wave UV (typical for certain color-change stones)
Inclusions
Small pinpoint inclusions and subtle needle-like rutile inclusions typical of natural color-change chrysoberyl
Blemishes
Minor natural surface abrasions along the facet junctions
Origin
Possible Brazilian or East African origin if natural, or Czochralski-pulled synthetic if lab-created.
Treatment Detection
No obvious signs of fracture filling or diffusion treatment; standard unheated/untreated color-change stone characteristics.
Estimated Value
Varies widely depending on natural vs lab origin: $1,500 - $10,000+ if natural alexandrite; $100 - $300 if synthetic.
Certification Estimate
GIA or Gübelin Gem Lab (Color-Change Chrysoberyl / Alexandrite report)
Investment Potential
High if certified as a natural high-color-change Alexandrite with strong saturation; low if synthetic.
Similar Diamonds
N/A (comparable high-end color-change gemstones like fine Alexandrite or Zultanite/Diaspore)
Setting Suggestions
Yellow or rose gold basket setting to accentuate the warm red/green dichroism, protected by double prongs at the corners.
Care & Maintenance
Avoid ultrasonic cleaners if inclusions are present; clean gently with warm soapy water and a soft brush.
Interesting Facts
Known in the gem trade as 'emerald by day, ruby by night' due to its dramatic color change under incandescent versus daylight.