Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
A natural 1.13 carat white sapphire in a radiant cut, colorless and untreated, documented on AGCL Report #M263118. Radiant-cut colorless sapphire at 1.13 carats is a practical, modern diamond alternative — the radiant's cropped corners and brilliant faceting produce strong light return in colorless material, and the rectangular silhouette gives it a more structured, contemporary look than a round brilliant. At Mohs 9, white sapphire is the hardest colorless gemstone alternative to diamond, fully appropriate for daily ring wear.
Expert Opinion
Ahmed Shareek's Assessment
"At 1.13 ct, this radiant-cut white sapphire is sized to carry as a genuine engagement-ring center stone rather than an accent — and the radiant cut gives it noticeably more brilliance than a step-cut shape in this same color. Loupe-clean clarity at this size is worth noting; it's not a given in colorless corundum."
Rarity Analysis
What makes this particular stone stand out:
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Color: Natural colorless corundum, with no heat treatment applied to achieve or improve the colorless appearance.
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Size: 1.13 ct sits within the standard center-stone range for rings, a size where clean colorless material is harder to source than smaller melee-sized stones.
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Treatment: AGCL Report #M263118 confirms no indication of heating.
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Clarity: Graded loupe-clean, meaning no visible inclusions even under magnification.
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Documentation: Independently lab-certified with weight, shape, and treatment status confirmed.
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Combined effect: an untreated, loupe-clean, over-1-carat colorless sapphire is a smaller pool than the general white sapphire market, most of which is heat-treated to remove residual color.
Buying Guidance
A few practical points to weigh before purchasing this specific stone:
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Setting compatibility: at 6.3 x 4.86 mm, this radiant cut needs a setting sized for its rectangular outline, not a round mounting — confirm with your jeweler or use our custom ring service.
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Diamond alternative comparison: white sapphire is harder than most diamond simulants but reads slightly less brilliant than diamond; view in person or via video if brilliance is a deciding factor.
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Corner protection: radiant cuts have corners that benefit from protective prong or bezel placement in daily-wear settings.
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Certification: retain the AGCL report as the primary record 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 # |
CG8392 |
| Carat Weight |
1.13 ct |
| Species / Variety |
Natural Corundum — White (Colorless) Sapphire |
| Shape / Cut |
Radiant (Octagonal), Radiant Cut |
| Dimensions |
6.3 x 4.86 x 3.90 mm |
| Color / Intensity |
White (Colorless) |
| Phenomenon |
None |
| Treatment |
Unheated — No Indication of Heating per AGCL Report #M263118 |
| Origin |
Sri Lanka (Ceylon) (store's own assessment; not addressed by the AGCL report) |
| Clarity |
Loupe Clean — eye-clean, no visible inclusions under normal viewing |
| Transparency |
Transparent |
| Hardness |
9 (Mohs) |
| Certification |
AGCL Report #M263118 |
Why Choose this 1.13 ct Radiant White Sapphire?
Radiant-cut white sapphire balances the brilliance of a round brilliant with the structured outline of a rectangular step cut — more sparkle than an emerald cut, more architectural presence than a round. At 1.13 carats, this is in the standard center stone range for engagement rings and pendants, and untreated status confirms the colorlessness is entirely natural.
Key Benefits of this Natural White Sapphire
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Untreated Natural Colorless
No heat treatment — natural colorless corundum exactly as found.
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Radiant Cut Balance
Brilliant faceting in a rectangular outline — more sparkle than step cuts, more structure than rounds.
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Mohs 9 Hardness
Second hardest natural material — appropriate for daily ring wear without special care.
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Center Stone Size
1.13 carats — practical weight for engagement ring and pendant center stone use.
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Natural Diamond Alternative
Colorless, hard, untreated — without the diamond price point.
Features
- Carat Weight: 1.13 Carats
- Gem Type: Natural White Sapphire
- Shape: Radiant (Octagonal)
- Cut Style: Radiant Cut
- Treatment: Unheated — No Indication of Heating per AGCL Report #M263118
- Color: White (Colorless)
- Clarity: Loupe Clean — 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 #M263118
- Hardness: 9 on the Mohs scale
This 1.13 ct radiant white sapphire has been hand-selected for colorlessness and loupe-clean clarity — the qualities that define an effective colorless center stone in any setting.
Why Customers Love This Gemstone
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Untreated Colorless: Natural — no coating or enhancement.
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Radiant Balance: The middle ground between sparkle and structure for colorless center stones.
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Diamond Alternative Hardness: Mohs 9 for daily wear durability.
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Trusted Source: Untreated status disclosed honestly, selected for colorlessness.
Owning this 1.13 ct radiant white sapphire means choosing the most durable colorless diamond alternative in the cut that balances brilliance and architectural presence.
Perfect Uses for this 1.13 ct White Sapphire
- Engagement ring center stone — diamond alternative
- Pendant solitaire
- Modern minimalist ring design
- East-west bezel setting
- September birthstone gift
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