Earth-Toned Songea Sapphire Set I - Songea, Tanzania - 2.13ct (Total)

• Gemstone: Natural Fancy Green Sapphire
• Species / Variety: Corundum / Fancy Green Sapphire
• Color: Olive, Sage & Forest Green
• Tone & Saturation: Medium-Light to Medium-Dark / Moderate Saturation
• Origin: Songea, Ruvuma Region, Tanzania
• Total Carat Weight: 2.13 ct
• Number of Stones: 7
• Average Weight: ~0.30 ct per stone
• Shape: Oval
• Cut: Modified Brilliant
• Dimensions: 5.00 × 3.00 mm each
• Clarity: VVS–VS, estimated
• Transparency: Transparent
• Pleochroism: Distinct sage-to-olive/yellowish-green shifts
• Treatment: Represented as natural, unheated & untreated
• Hardness: Mohs 9

The seven stones form a cohesive sequence of earthy green hues, ranging from lighter sage and olive tones toward deeper forest green. Under rotation, noticeable pleochroism produces subtle transitions between cool sage-green and warmer olive or yellowish-green facets.

Rather than presenting as seven identical commercial greens, the suite possesses a restrained natural variation that gives the completed arrangement greater visual depth while maintaining strong overall harmony.

The suite exhibits excellent optical transparency with bright internal reflection and a clean face-up appearance. Minor growth structures and pinpoint inclusions are visible under approximately 10× magnification but do not materially affect the visual presentation.

The defining feature of the cutting is its precision calibration. All seven stones measure approximately 5.00 × 3.00 mm, maintaining a consistent 1.67:1 length-to-width ratio across the suite.

This dimensional uniformity makes the parcel particularly valuable for jewelry construction, allowing the stones to function as a coordinated architectural unit rather than as unrelated individual gems.

The stones are represented as natural, unheated, and untreated.

Corundum's Mohs hardness of 9 provides excellent resistance to scratching and makes sapphire highly suitable for daily-wear jewelry. The compact calibrated forms are particularly appropriate for channel, bezel, flush, and other protective architectural settings.

As with any treatment claim not accompanied by an independent laboratory report, natural and untreated status should be considered represented rather than independently verified.

The suite is represented as originating from Songea, Ruvuma Region, Tanzania.

Songea is recognized for producing sapphires across an unusually broad range of natural colors. Trace elements including magnesium, beryllium, iron, and titanium may contribute to the varied color chemistry encountered in the locality.

This particular suite is distinguished not by the more flamboyant orange, bronze, or golden Songea colors, but by its unusually cohesive sequence of earthy olive, sage, and forest green.

The principal distinction of this suite is its combination of calibration, coherence, and design utility.

At approximately 0.30 carats per stone, the individual sapphires are modest in scale. Collectively, however, the seven precisely matched 5 × 3 mm stones form a considerably more useful design component.

The suite is especially suited to continuous bands, channel-set compositions, articulated architectural forms, linear arrangements, or repeated geometric motifs in which dimensional consistency is essential.

Independent gemological laboratory verification of natural status, treatment, and origin may be arranged upon request.

Every stone offered by the House is selected for more than nominal rarity. Color, proportion, clarity, cutting, material integrity, and the way a gemstone responds to light are considered together.

At Dante Bianco, a gemstone is not simply a measure of carat weight or a line on an inventory sheet. It is a material with its own optical character, physical structure, and potential within a considered design. Each stone is chosen for the qualities that make it worthy of attention and for the possibilities it presents to the collector who recognizes them.