Parti Sapphire · Facet Rough · 3.9 ct · Untreated

Few sapphires display such a fascinating blend of colors as this natural crystal from Tanzania. Depending on the viewing angle and lighting, vibrant shades of teal blue, green, and subtle hints of yellow merge into a lively appearance that gives the rough exceptional character even before it is cut.

With an estimated 90% facetable volume, this untreated sapphire offers excellent cutting potential while preserving much of its original crystal. Its elongated shape naturally lends itself to elegant faceting designs, allowing an experienced cutter to maximize both color and brilliance. Whether transformed into an oval, cushion, or another precision-cut design, the finished gemstone has the potential to reveal remarkable depth and vivid light return.

The crystal is slightly included, a natural feature commonly found in untreated sapphires and a testament to its geological origin. Thanks to its transparent nature, careful orientation during cutting can highlight the most vibrant color areas while achieving an attractive balance between clarity, yield, and overall appearance.

Natural teal sapphires have become increasingly sought after for their unique color palette, offering an alternative to traditional blue sapphires while remaining entirely natural. Their shifting combination of blue and green tones creates a gemstone that appears to change with different lighting conditions, making every finished stone truly distinctive.

Specifications

• Stone type: Natural Sapphire
• Origin: Tanzania
• Weight: 3.92 ct
• Dimensions: 11.0 × 6.5 × 5.2 mm
• Treatment: Untreated
• Clarity: Slightly Included
• Color: Teal Blue, Green with subtle hints of Yellow
• Transparency: Transparent
• Rough Type: Crystal
• Facet Potential: Facet Grade
• Facetable Volume: ~90%
• Estimated Yield: ~30%