Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
A natural 1.65 ct Oval Ruby from Madagascar, completely unheated — no indications of heating per GIA. Ruby is natural corundum colored by chromium — the same mineral species as sapphire, but with enough chromium that the color enters the red range rather than remaining pink. Unheated ruby above 1 carat with GIA documentation is a genuinely scarce combination, since the overwhelming majority of ruby on the market is heat treated. GIA Report #2245032085 confirms weight, dimensions, origin, and treatment status.
Expert Opinion
Ahmed Shareek's Assessment
"This is one of the more honest ruby purchases you can make — a 1.65 carat oval that's fully unheated and GIA-documented, with saturation that doesn't need a furnace to get there. Stones like this rarely cross a carat without someone reaching for a torch first, so when one does, it earns its place in a collection."
Rarity Analysis
Several factors compound to make this specific stone unusual, not just desirable:
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Unheated Status: The vast majority of ruby sold worldwide is heat treated to improve color and clarity — untreated material is the exception, not the rule.
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Carat Weight Threshold: Untreated ruby becomes progressively harder to find as size increases, since larger rough with naturally good color and clarity is rarely left untreated by cutters.
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GIA Documentation: Most ruby on the market — heated or not — is never submitted for independent lab analysis. A GIA report stating "no indications of heating" is a further narrowing of an already small pool.
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Madagascar Origin: Madagascar is a significant modern ruby source, but fine untreated material in commercial quantity remains limited relative to the broader heated supply.
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Eye-Clean Clarity: Eye-clean clarity combined with unheated status and rich color saturation is a combination rarely found together in a single stone.
Buying Guidance
A few things worth checking before buying any unheated, GIA-documented ruby like this one:
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Match the report to the stone: Confirm the GIA report number, measurements, and weight listed on the certificate match the physical stone you receive.
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Understand what "unheated" means: GIA's "no indications of heating" is a laboratory finding based on internal features, not a guarantee of subjective color quality — evaluate the stone's color and clarity for yourself alongside the report.
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Choose a protective setting: A rare, untreated stone is worth protecting — prong or bezel settings that shield the girdle and pavilion from daily impact are a sensible choice for ring use.
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Expect a premium over heated material: Unheated ruby with GIA documentation commands a meaningfully higher price per carat than comparable heated stones — that premium reflects genuine scarcity, not markup alone.
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Buy from a seller who discloses treatment plainly: Treatment status should be stated clearly and match the lab report — be cautious of listings that are vague about heating.
Learn More About This Gemstone
Gemstone Data — At a Glance
| Item # |
CG8456 |
| Carat Weight |
1.65 Carats |
| Species/Variety |
Natural Ruby (Corundum) |
| Shape/Cut |
Oval / Mixed Brilliant |
| Dimensions |
7.77 x 5.98 x 4.39 mm |
| Color/Intensity |
Red / Intense |
| Phenomenon |
None |
| Treatment |
None — Unheated |
| Origin |
Madagascar |
| Clarity |
Eye-clean — no visible inclusions under normal viewing |
| Transparency |
Transparent |
| Hardness |
9 Mohs |
| Certification |
GIA Report #2245032085 |
Why Choose this 1.65 ct Unheated Oval Ruby?
The GIA report on this stone provides the independent documentation that distinguishes a verified, unheated ruby from an unsubstantiated claim. Ruby is one of the most commercially misrepresented colored gemstones — heat-treated material is routinely sold without disclosure, and pink sapphires, red spinels, and low-quality material are sometimes sold as ruby entirely. A GIA report resolves the ambiguity: it confirms the material is natural corundum of ruby color, weight, dimensions, and origin, with treatment status stated explicitly as untreated.
Key Benefits of this Natural Unheated Ruby
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GIA-Documented Ruby
Independent confirmation of species, weight, dimensions, origin, and treatment status.
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Completely Unheated
No indications of heating per GIA — a rare and highly sought-after distinction for ruby.
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Madagascar Origin
Madagascar is a significant modern source of fine natural ruby.
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Oval Cut Versatility
The most practical ruby shape for engagement rings and pendants.
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Durable for Daily Wear
Corundum at Mohs 9, second only to diamond.
Features
- Item #: CG8456
- Carat Weight: 1.65 Carats
- Gem Type: Natural Ruby (Corundum)
- Cut: Oval / Mixed Brilliant
- Dimensions: 7.77 x 5.98 x 4.39mm
- Origin: Madagascar
- Treatment: None — Unheated
- Color: Red / Intense
- Clarity: Eye-clean — no visible inclusions under normal viewing
- Transparency: Transparent
- Hardness: 9 on the Mohs scale
- Certification: GIA Report #2245032085
Care of Your Madagascar Ruby
- 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
What's Included
- GIA Report #2245032085
- Gemstone packed in a gem sleeve
Perfect Uses for this 1.65 ct Ruby
- Engagement ring center stone
- Statement pendant or cocktail ring
- Collectors of GIA-documented unheated natural ruby
- July birthstone gift
- Anniversary or romantic milestone gift
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