Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
A natural 0.36 carat yellow sapphire in a square cushion cut, completely unheated, documented on AGCL Report #M262739. At sub-half-carat weight in a cushion format, this stone is sized for stackable rings, accent jewelry, and earring applications where a small, warm yellow creates a concentrated color point without requiring significant carat weight. Unheated status at this size is uncommon — most commercial sub-half-carat yellow sapphires are heat-treated. Natural color at 0.36 carats represents the rarest form of this hue at an accessible weight.
Expert Opinion
Ahmed Shareek's Assessment
"This 0.36 ct stone is a good example of how uncommon unheated color gets once you drop below half a carat — most yellow sapphire this small on the market has been heat-treated to even out the tone, and this one didn't need it. The square cushion cut holds the color well even at this scale."
Rarity Analysis
Several factors combine to make this a genuinely uncommon stone at this weight:
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Color: Natural golden yellow, unmodified by heat treatment.
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Size: At 0.36 ct, most commercial yellow sapphires this small are routinely heated — unheated material at sub-half-carat weight is rarely offered with individual lab certification.
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Treatment: AGCL Report #M262739 confirms no indication of heating.
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Cut: The square cushion shape concentrates color return in a small stone, an advantage at sub-half-carat weights where saturation can otherwise look thin.
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Documentation: Independently lab-certified by AGCL, with weight, dimensions, and treatment status confirmed.
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Combined effect: unheated, certified color at this small a size is not the norm — most yellow sapphire this size on the market has been heat-treated.
Buying Guidance
A few practical points to weigh before purchasing this specific stone:
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Sizing for setting: at 3.98 x 3.98 mm, this stone suits accent, stacking, or earring settings rather than a large solitaire — confirm mm dimensions against your setting's stone seat before ordering.
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Compare against heated alternatives: heated yellow sapphires of similar size are more common and typically less expensive; this stone carries a premium specifically for its unheated status.
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Jyotish buyers: if using for Vedic astrological purposes, confirm with your astrologer whether 0.36 ct meets the recommended minimum weight for your use case.
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Certification: keep the AGCL report with the stone; it is the primary documentation of treatment status.
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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 # |
CG8390 |
| Carat Weight |
0.36 ct |
| Species / Variety |
Natural Corundum — Yellow Sapphire |
| Shape / Cut |
Square Cushion, Mixed Brilliant |
| Dimensions |
3.98 x 3.98 x 2.63 mm |
| Color / Intensity |
Golden yellow |
| Phenomenon |
None |
| Treatment |
Unheated — No Indication of Heating per AGCL Report #M262739 |
| Origin |
Sri Lanka (Ceylon) (store's own assessment; not addressed by the AGCL report) |
| Clarity |
Eye-clean — no visible inclusions under normal viewing |
| Transparency |
Transparent |
| Hardness |
9 (Mohs) |
| Certification |
AGCL Report #M262739 |
Why Choose this 0.36 ct Unheated Cushion Yellow Sapphire?
Sub-half-carat unheated yellow sapphire in a cushion cut is the format for buyers who want natural color in the smallest practical jewelry size — for Jyotish use at a lighter weight, for accent jewelry, or for collectors who want unheated quality across a range of sizes. The cushion cut concentrates the yellow saturation in even a small stone.
Key Benefits of this Natural Yellow Sapphire
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Unheated Natural Yellow
No thermal treatment — rare at sub-half-carat weight in yellow sapphire.
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Cushion Cut Saturation
The cushion geometry concentrates yellow even in a small stone.
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Accessible Small Weight
0.36 carats for earring accents, stackable rings, and small jewelry applications.
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Jyotish-Suitable
Unheated natural yellow sapphire (Pukhraj) for Vedic astrological use at smaller carat weights.
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Durable for Daily Wear
Corundum at Mohs 9, second only to diamond.
Features
- Carat Weight: 0.36 Carats
- Gem Type: Natural Yellow Sapphire
- Shape: Square Cushion
- Cut Style: Mixed Brilliant
- Treatment: Unheated — No Indication of Heating per AGCL Report #M262739
- Color: Yellow
- Clarity: Eye-clean — no visible inclusions under normal viewing
- Transparency: Transparent
- Origin: Sri Lanka (Ceylon) (store's own assessment; not addressed by the AGCL report)
- Certification: AGCL Report #M262739
- Hardness: 9 on the Mohs scale
This 0.36 ct unheated cushion yellow sapphire has been hand-selected for the brightness of its yellow — natural color at a size where unheated quality is genuinely uncommon.
Why Customers Love This Gemstone
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Unheated at Small Size: Natural yellow at a weight where most commercial stones are heat-treated.
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Cushion Warmth: The cushion concentrates yellow saturation even at this compact weight.
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Jyotish-Ready: Unheated Pukhraj at a lighter, accessible weight.
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Trusted Source: Treatment disclosed honestly, stone selected for color quality.
Owning this 0.36 ct unheated cushion yellow sapphire means choosing a small stone with a natural color that most commercial alternatives at this weight cannot match.
Perfect Uses for this 0.36 ct Yellow Sapphire
- Stackable ring center stone
- Earring accent (pair)
- Jyotish / Vedic astrological use (light-weight Pukhraj)
- Small pendant accent
- Collectors of small unheated yellow sapphires
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