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1.28 carat oval-cut blue sapphire, unheated, measuring 6.48 × 5.42 × 4.70 mm. A medium-intense blue with strong brilliance across the mixed brilliant faceting. Origin is presented as the store's own assessment of Sri Lanka (Ceylon), as the AGCL report does not address geographic origin. Accompanied by AGCL Report #M2511398, confirming weight, dimensions, color, and treatment.
Expert Opinion
Ahmed Shareek's Assessment
"What stands out on this 1.28 carat oval is the pairing of true unheated color with a medium-intense Ceylon blue saturation — that combination gets harder to find as stone size increases, and this one holds it cleanly at just over a carat."
Rarity Analysis
Unheated blue sapphires that hold a strong, well-saturated Ceylon blue at this size make up a small slice of what actually reaches the market.
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Color: Medium-intense "Ceylon Blue" is the saturation level most buyers picture when they think of fine blue sapphire — many stones on the market run either too dark and inky or too pale to hit this tone.
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Size: At 1.28 carats, clean, well-proportioned ovals with strong, even saturation are noticeably less available than smaller melee-sized stones.
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Treatment: The large majority of blue sapphires sold today are heat-treated to improve or standardize color and clarity; this stone is unheated, so its color and clarity are entirely natural.
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Documentation: This stone is accompanied by an AGCL report confirming weight, dimensions, color, and treatment. The report does not address geographic origin, so the Sri Lanka (Ceylon) origin listed here reflects Crescent Gems' own assessment rather than a lab-confirmed origin determination — worth knowing if origin-specific documentation matters to you.
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Combined effect: It's the combination of natural unheated color, strong Ceylon-blue saturation, and independent lab documentation together — not any one factor alone — that makes a stone like this difficult to replace once sold.
Buying Guidance
A few practical points to weigh before purchasing this specific stone:
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Check light performance across the shape. Oval mixed-brilliant cuts like this one depend on the pavilion facets to return light evenly along the elongated outline — view the stone from a few angles to confirm consistent brilliance rather than dark "bowtie" zones at the ends of the oval.
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Confirm the fit before mounting. At 6.48 × 5.42 × 4.70 mm, this stone will suit most standard oval prong or halo settings, but share the exact dimensions with your jeweler or with Crescent Gems before committing to a mount, especially for bezel styles.
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Verify treatment claims independently. When comparison-shopping, ask any seller to show a current lab report that explicitly states "no heat" or "unheated" rather than relying on a listing description alone — this stone's AGCL report does exactly that.
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Weigh the rarity premium. Because unheated stones with this level of saturation are less common at this carat weight (see Rarity Analysis above), expect unheated examples to carry a premium over comparable heated stones when comparing prices.
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Use the Try Before You Buy option if you would like to see the stone in hand before finalizing the purchase.
Learn More About This Gemstone
Gemstone Data — At a Glance
| Item # |
CG8330 |
| Carat Weight |
1.28 ct |
| Species / Variety |
Natural Blue Sapphire (Corundum) |
| Shape / Cut |
Oval, Mixed Brilliant |
| Dimensions |
6.48 × 5.42 × 4.70 mm |
| Color / Intensity |
Blue (Ceylon Blue) |
| Phenomenon |
None |
| Treatment |
Unheated |
| Origin |
Sri Lanka (Ceylon) — store's own assessment; not addressed by the AGCL report |
| Clarity |
Eye-clean |
| Transparency |
Transparent |
| Hardness |
9 (Mohs) |
| Certification |
AGCL Report #M2511398 |
Features
- SKU: CG8330
- Carat Weight: 1.28 carats
- Variety: Blue Sapphire
- Shape: Oval
- Cutting Style: Mixed Brilliant
- Dimensions: 6.48 × 5.42 × 4.70 mm
- Gem Type: Natural Blue Sapphire
- Origin: Sri Lanka (Ceylon) (store's own assessment; not addressed by the AGCL report)
- Treatment: Unheated
- Color: Blue (Ceylon Blue)
- Transparency: Transparent
- Clarity: Eye-clean — no visible inclusions under normal viewing
- Certification: AGCL Report #M2511398
- Hardness: 9 on the Mohs scale
Care
- Clean with lukewarm water and mild soap using a soft brush
- Store separately to avoid surface contact
- Remove before heavy physical activity
- Avoid ultrasonic or steam cleaners
One of a Kind
This is a single natural gemstone, not a manufactured or lab-created replica — no two sapphires form with identical color, inclusions, and internal character. Once this stone sells, it's gone; there is no duplicate. What you see documented on the AGCL report is the exact, individual stone you receive.
What's included with this Blue Sapphire
- AGCL Report #M2511398
- Gemstone packed in a gem sleeve
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