Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
A natural 1.29 ct unheated teal sapphire, cut as a rectangular cushion with a mixed brilliant faceting style, showcasing a rich blue-green color rare among natural sapphires.
Expert Opinion
Ahmed Shareek's Assessment
"This 1.29 ct teal sapphire is completely unheated per GIA Report #6247017788, and the rectangular cushion cut with mixed brilliant faceting really lets that blue-green color come through — GIA's own description, 'Blue and Yellowish Green,' is a great sign of a true teal rather than a stone leaning mostly blue or mostly green."
Rarity Analysis
Several factors combine to make this specific stone uncommon, even within the teal sapphire category:
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Color: Teal sits at the blue-green intersection few natural sapphires reach; GIA's own description of this stone as "Blue and Yellowish Green" confirms a genuine dual-hue balance rather than a sapphire that just leans blue.
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Size: At 1.29 ct, this stone clears the 1-carat mark, which is a meaningfully harder size to source in well-balanced teal material than smaller melee-sized stones.
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Treatment: Untreated with no indications of heating per GIA — a large share of sapphire on the market (including many teal stones) is heat-treated, so an unheated example is the less common find.
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Clarity: Graded Loupe Clean, meaning no inclusions are visible even under magnification — a clarity level that isn't a given in natural, untreated corundum.
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Documentation: Accompanied by a GIA Sapphire Origin Report (#6247017788), giving independent, third-party confirmation of the treatment status and characteristics described here.
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Combined effect: An unheated, loupe-clean teal sapphire over 1 carat with independent GIA documentation is a narrower combination than any single factor alone, and this listing shows only one unit in stock.
Buying Guidance
A few practical points to weigh before purchasing this specific stone:
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View it in more than one light source. Teal sapphires can read more blue or more green depending on the lighting — check the stone (or the video on this listing) under both daylight and indoor lighting before deciding.
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Plan the setting around its cushion proportions. At 7.56 x 5.93 x 3.57mm, this is an elongated rectangular cushion, so a setting designed for that outline (rather than a square cushion) will show the stone off best.
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Ask any seller for the treatment disclosure in writing. Because so much teal sapphire on the market is heat-treated, confirm unheated status is stated on the lab report itself, not just in the listing copy — this stone's GIA report states no indications of heating.
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Weigh availability against the Rarity Analysis above. Unheated teal sapphires with GIA documentation in this size and clarity don't restock on a predictable schedule, and only one of this exact stone exists.
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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 # |
CG8437 |
| Carat Weight |
1.29 ct |
| Species / Variety |
Teal Sapphire (Natural Corundum) |
| Shape / Cut |
Rectangular Cushion / Mixed Brilliant |
| Dimensions |
7.56 x 5.93 x 3.57 mm |
| Color / Intensity |
Teal (blue-green); GIA describes it as "Blue and Yellowish Green" |
| Phenomenon |
None |
| Treatment |
Untreated — No Indications of Heating (per GIA Report #6247017788) |
| Origin |
Basalt-related — GIA could not determine a specific country; possible origins include Australia, Thailand, Nigeria, and others per the report |
| Clarity |
Loupe Clean |
| Transparency |
Transparent |
| Hardness |
9 (Mohs) |
| Certification |
GIA Report #6247017788 |
Specifications
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Variety: Teal Sapphire (Natural Corundum)
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Weight: 1.29 cts
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Dimensions: 7.56 × 5.93 × 3.57 mm
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Shape: Rectangular Cushion
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Cut Style: Mixed Brilliant
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Treatment: Untreated — No Indications of Heating (per GIA Report #6247017788)
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Color: Teal (blue-green); GIA's report describes it precisely as "Blue and Yellowish Green"
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Origin: Basalt-related — GIA could not determine a specific country; possible origins include Australia, Thailand, Nigeria, and others per the report
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Clarity: Loupe Clean
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Hardness: 9 on the Mohs scale
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Lab Report: GIA (Gemological Institute of America), Sapphire Origin Report #6247017788
Care of Teal Sapphire
- Clean with lukewarm water and mild soap using a soft brush
- Remove before heavy physical activity, sports, or manual work
- Avoid ultrasonic or steam cleaners
- Store separately from other jewelry to prevent scratching
One of a Kind
This is a natural, untreated gemstone — no two natural sapphires are exactly alike, and once this stone is sold it cannot be reordered or reproduced.
Why This Stone
Teal sapphires sit at the rare intersection of blue and green, a color combination few natural sapphires achieve without treatment. This 1.29 ct stone is completely unheated, cut as a rectangular cushion with a mixed brilliant faceting style that balances brilliance with color depth — a strong centerpiece for a custom engagement ring or pendant, or an addition to a collection of natural, untreated sapphires.
Suited For
Engagement rings · custom pendants · collectors of natural untreated sapphires · anniversary and statement jewelry
What's Included
- GIA Sapphire Origin Report #6247017788
- Gemstone packed in a gem sleeve
Free US shipping; Try-On available.
Item #: CG8437 | GIA Report #: 6247017788
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