3.20 Carat Color Change Sapphire Facet Rough – Light Blue With White Cross Table For Sale

Unlock a rare optical wonder with this premium 3.20-carat color change sapphire facet rough sourced from the world-renowned gem fields of Madagascar. Unmodified and entirely natural, this piece is an exceptional find specifically curated for gem professionals, precision faceters, and investment collectors.
This stone boasts a color shift On One Axis (the white axis does not change), transitioning from a, Light Blue under LED to a delicate, pastel pink under incandescent lighting. Sapphires exhibiting this color transition are rare, making this a highly prized addition to any gem collection or high-end custom jewelry project.
Gemstone Specifications:

Weight: 3.20 carats

Dimensions: 7.9 x 7.8 x 5.7 mm

Color Behavior: color change from Light Blue (white light) to Pastel Pink (Incandescent) On One Axis.

Origin: Madagascar

Shape/Cut: Uncut / Facet Rough

Treatment: None (100% Natural, Unmodified)

This rough sapphire possesses a rare optical combination of pleochroism (white on the a-axis vs. light blue on the c-axis) and the prestigious Alexandrite type effect (changing to pink under warm incandescent light).

Because color-change properties dictate how the final gem Should be oriented, the cutting strategy should, in my opinion, favor a higher emphasis on optical physics over raw weight preservation. Your optimized yield is estimated between 0.80 and 1.12 carats (a highly respectable 25% to 35% weight retention)

The Yield Trade-off: The rough stone's physical dimensions (7.7 x 7.8 x 5.7 mm) dictate how deep a stone can be cut. The c-axis is tilted diagonally across the rough, So you will have to tilt the gemstone's orientation inside the block, slicing away good material just to align the axes correctly. This could pull your yield down toward 25%.

The Best Cut Selections for Color-Change PerformanceWhen dealing with a stone that changes color, certain faceting designs are vastly superior at blending and magnifying the light wavelengths:

Cushion Brilliant or Oval Mixed Cut30% – 35% (approx. 0.96 – 1.12 cts)In My Opinion The Best Overall Selection. These styles feature a brilliant-cut crown (top) and a mixed-step pavilion (bottom). The curved facets beautifully mix the light, helping to fully saturate the "light blue" state in daylight while letting the pink flash violently under incandescent bulbs.

Round Brilliant25% – 28% (approx. 0.80 – 0.90 cts)Best for Masking the White Axis. Because the a-axis is colorless/white, a standard round cut creates maximum internal light reflection ("scintillation"). This massive sparkle helps mask the colorless axis and forces the face-up eye to primarily see the changing blue-to-pink shifts.

Radiant Cut28% – 32% (approx. 0.90 – 1.02 cts)Best for Modern Contrast. The dense, crisscrossing facet patterns on a square radiant cut are famous for intensifying body color. This will make the light blue look a shade deeper in the shade and show a dramatic, crisp swap to pink indoors.

THESE ARE ONLY ESTIMATES AND SUGGESTIONS. THERE IS MANY A SLIP TWIXT THE SPOON AND THE LIP.

Shipping & Combined Ordering

USA Shipping: Fast and reliable shipping to the United States is fully guaranteed and hassle-free.

Combined Shipping Discount: Expand your collection and save! Pay only $0.50 shipping for each additional item added to your order.

Risk-Free 100% Satisfaction Guarantee

Buy with absolute confidence. All stones are backed by a 100% Satisfaction Guarantee. If you are not totally thrilled with your rough gemstone, simply return it for a full refund—including your original postage costs. Your satisfaction is our top priority!