
Madagascar Ruby - 3.04 ct, Purplish Red, Untreated
This 3.04 carat natural purplish-red ruby presents a compelling combination of documented origin, untreated status, and substantial size within the three-carat category. Cut in an oval shape with a brilliant/step faceting style (9.04 × 8.32 × 4.88 mm), the stone offers balanced proportions designed to emphasize color presence and internal light interaction rather than optical perfection.
With SI clarity, this ruby exhibits clearly identifiable internal features, visible under magnification and partially perceptible to the naked eye depending on lighting conditions. These inclusions form a pronounced internal jardin, characteristic of natural, unheated rubies from primary deposits. Rather than detracting from the stone’s identity, they serve as direct evidence of its geological formation and untreated condition.
The accompanying GRS Gemstone Report confirms “No indication of thermal treatment.” In the context of ruby valuation, the absence of heat treatment is a decisive factor, often prioritized over higher clarity grades—particularly in stones exceeding three carats. A ruby of this size displaying SI clarity without thermal enhancement occupies a fundamentally different category than visually cleaner but treated counterparts.
The stated Madagascar origin is recognized within the gem trade for producing rubies with complex internal structures and distinctive color profiles. Untreated examples above three carats remain limited in availability and are increasingly evaluated as collector-grade material rather than conventional jewelry stock.
This stone has been selected as a transparent, defensible specimen, suitable for buyers who understand that absolute visual purity is not the defining metric of value in natural rubies. While appropriate for bespoke jewelry applications, its primary appeal lies in its documented integrity, untreated status, and clear disclosure of natural characteristics.
Investment Context
- Natural ruby exceeding 3.00 ct
- No indication of thermal treatment (GRS)
- SI clarity consistent with unheated material
- Recognized Madagascar origin
- Market-relevant size with increasing scarcity
Gemological Disclosure
This ruby contains visible natural inclusions typical of unheated stones from primary deposits. These internal features do not compromise the stone’s stability and are an inherent part of its natural identity. Their presence confirms the absence of artificial enhancement and reflects the geological conditions under which the ruby formed.
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Documentation & Verification
Every gemstone is supplied with the documentation stated in the product specification. This may include an independent laboratory certificate or a Sosna Gems Colored Stone Report.
Additional or alternative independent laboratory certification can be arranged upon request for eligible gemstones.

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Every bespoke piece begins with a gemstone. Selected gemstones from our collection can be transformed into individually designed jewelry, created around the proportions, character and intended use of each stone.
Every design is developed in consultation with our gemologists and goldsmiths, ensuring that the finished piece complements both the gemstone and your preferences.
Gemological overview
Technical and gemological information about this gemstone variety.





