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CHF 830.37
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2.70 carat square cushion-cut yellow sapphire, sourced from Sri Lanka (Ceylon, GIA-confirmed) and unheated, measuring 7.64 × 7.63 × 5.39 mm. Eye-clean clarity and strong light return across the mixed brilliant faceting. Accompanied by GIA Report #6237836235, a Sapphire Origin Report confirming weight, dimensions, color, geographic origin, and treatment status.
Expert Opinion
"Most yellow sapphires on the market have been heated to lighten inclusions and even out color, so an unheated stone at this size is already unusual," says Ahmed Shareek, gemologist at Crescent Gems. "What makes this particular sapphire stand out is the paperwork behind it: GIA's Sapphire Origin Report doesn't just confirm the stone is natural and untreated, it also confirms the corundum grew in Sri Lankan gem gravels. Very few stones carry a single document verifying both treatment and origin — most sellers can only speak to one or the other, and often on the strength of the seller's word rather than a lab's. Here, GIA has done the verifying."
Rarity Analysis
- The vast majority of yellow sapphire in the trade is heat-treated to improve or deepen its color; an unheated stone of this hue at 2.70 carats is a genuinely scarce find
- This stone carries a GIA Sapphire Origin Report rather than a basic identification report — Origin Reports require additional analysis and are issued far less frequently, making the documentation itself a differentiator
- Eye-clean clarity at this carat weight is uncommon in untreated sapphire, where heating is often used specifically to mask inclusions that remain visible here only under magnification
- The saturated, even yellow color has not been artificially enhanced, so what you see is the stone's natural, as-mined hue
- Sri Lanka (Ceylon) is the classic, historically prized source for fine yellow sapphire, and having that origin GIA-confirmed rather than seller-stated adds meaningful credibility
- Combined effect: unheated status, GIA-confirmed Ceylon origin, eye-clean clarity, and size rarely converge in one stone — together they place this sapphire well outside the ordinary run of commercial yellow sapphire
Buying Guidance
- Always verify unheated status through an independent gemological laboratory report rather than a seller's description alone — treatment claims should be backed by lab analysis, not assurance
- When comparison shopping, distinguish between a basic identification report (confirms species and treatment) and an Origin Report like this one (also confirms geographic source) — the two are not interchangeable, and Origin Reports typically command a premium for good reason
- Check that the report number on any accompanying paperwork matches the stone in hand; GIA report numbers can be verified directly on GIA's website
- Compare eye-clean claims in person or under strong lighting where possible, since clarity descriptions can vary between sellers
- Try Before You Buy: request additional photos or video under different lighting, and ask questions about the stone directly before purchasing, so you know exactly what you're getting
Learn More About This Gemstone
Gemstone Data — At a Glance
| Item # |
CG8313 |
| Carat Weight |
2.70 ct |
| Species / Variety |
Natural Yellow Sapphire (Corundum) |
| Shape / Cut |
Square Cushion, Mixed Brilliant |
| Dimensions |
7.64 × 7.63 × 5.39 mm |
| Color / Intensity |
Yellow, Saturated |
| Phenomenon |
None |
| Treatment |
None — unheated and untreated |
| Origin |
Sri Lanka (Ceylon) — GIA confirmed |
| Clarity |
Eye Clean — our own assessment; GIA colored-stone reports carry no clarity grade |
| Transparency |
Transparent |
| Hardness |
9 (Mohs) |
| Certification |
GIA Report #6237836235 |
Features
- SKU: CG8313
- Carat Weight: 2.70 carats
- Variety: Yellow Sapphire
- Shape: Square Cushion
- Cutting Style: Mixed Brilliant (brilliant crown, step cut pavilion)
- Dimensions: 7.64 × 7.63 × 5.39 mm
- Gem Type: Natural Yellow Sapphire
- Origin: Sri Lanka (Ceylon) — GIA confirmed
- Treatment: None — unheated and untreated
- Color: Yellow
- Transparency: Transparent
- Clarity: Eye Clean — our own assessment, not a GIA grade
- Certification: GIA Report #6237836235
- 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 GIA report is the exact, individual stone you receive.
What's included with this Yellow Sapphire
- GIA Report #6237836235
- Gemstone packed in a gem sleeve
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