Buying a loose gemstone gives you independence, you get the freedom to make your own choice, your own jewelry design.
A natural 1.62 carat blue sapphire in a round cut, from Sri Lanka (Ceylon), heat treated and certified by GIA (Sapphire Origin Report #2245017785, confirming Sri Lanka origin). The round brilliant-family cut produces excellent light return in colored gemstones — in Ceylon blue, this translates to a stone that is vivid and active under any lighting condition, from natural daylight to indoor incandescent. At 1.62 carats, this sits solidly in the center stone range, with sufficient face-up surface for clear visibility in any ring or pendant setting.
Expert Opinion
Ahmed Shareek's Assessment
"This 1.62 ct round Ceylon sapphire shows the vivid, medium-intense blue that GIA's Sapphire Origin Report confirms as Sri Lankan — the round Modified Brilliant cut keeps that saturation active across the whole face of the stone rather than concentrating it near the culet."
Rarity Analysis
A look at how this specific stone's specifications stack up within the blue sapphire category:
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Color: Vivid, medium-intense blue — the saturation level most closely associated with fine Ceylon sapphire.
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Size: At 1.62 ct, this falls within the standard engagement-ring center stone weight range, a size point with steady demand.
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Treatment: Heat treated, as disclosed on the GIA report — the standard, widely accepted treatment for blue sapphire that does not change the stone's identity as natural corundum.
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Clarity: Eye-clean and transparent, with no visible inclusions under normal viewing.
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Documentation: Origin and treatment are independently confirmed by a GIA Sapphire Origin Report (#2245017785), rather than resting on the seller's own assessment.
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Combined effect: The combination of a confirmed Ceylon origin, an eye-clean grade, and a round brilliant-family cut places this stone in the well-documented, consistently in-demand segment of the blue sapphire market.
Buying Guidance
A few practical points to weigh before purchasing this specific stone:
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View it under mixed lighting. Under both daylight and warm indoor light, the round Modified Brilliant cut should keep the medium-intense blue reading evenly saturated rather than darkening toward the edges.
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Check setting compatibility. At 6.42–6.63 x 4.76 mm, this round stone fits standard prong or halo settings sized for a round center stone in this weight range without custom fabrication.
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Confirm the documentation when comparison shopping. Look for a report from a major lab such as GIA rather than a dealer's own certificate when comparing this stone to other Ceylon blues near this weight.
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Weigh the value proposition. A round, eye-clean, GIA-documented Ceylon blue sapphire at this size is a commonly requested combination — see the Rarity Analysis above for how the size, clarity, and documentation add up.
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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 # |
CG8342 |
| Carat Weight |
1.62 ct |
| Species / Variety |
Corundum / Natural Blue Sapphire |
| Shape / Cut |
Round / Modified Brilliant |
| Dimensions |
6.42-6.63 x 4.76 mm |
| Color / Intensity |
Blue — Vivid, Medium Intense |
| Phenomenon |
None |
| Treatment |
Heat Treated |
| Origin |
Sri Lanka (Ceylon) |
| Clarity |
Eye-clean — no visible inclusions under normal viewing |
| Transparency |
Transparent |
| Hardness |
9 (Mohs) |
| Certification |
GIA Report #2245017785 |
Why Choose this 1.62 ct Round Ceylon Blue Sapphire?
Round Ceylon blue sapphire at this weight is one of the most consistently demanded configurations in the colored gemstone market — the combination of the most familiar cut with the most recognized origin and a size that works in standard engagement settings. The round brilliant-family cut maximizes light return and saturation simultaneously, making the Ceylon blue read at its most vivid in any lighting environment.
Key Benefits of this Natural Blue Sapphire
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Ceylon Blue Origin
Sri Lanka — the benchmark source for vivid blue sapphire, confirmed by GIA's Sapphire Origin Report.
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Round Brilliant-Family Cut
A Modified Brilliant cut that returns strong light — vivid and active blue face-up.
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Strong Center Stone Size
1.62 carats in a round — standard engagement ring center stone weight.
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Standard Setting Compatibility
Round cuts fit the widest range of settings without custom fabrication.
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Durable for Daily Wear
Corundum at Mohs 9, second only to diamond.
Features
- Carat Weight: 1.62 Carats
- Gem Type: Natural Blue Sapphire
- Shape: Round
- Cut Style: Modified Brilliant
- Origin: Sri Lanka (Ceylon)
- Treatment: Heat Treated
- Color: Blue
- Transparency: Transparent
- Clarity: Eye-clean — no visible inclusions under normal viewing
- Certification: GIA Sapphire Origin Report #2245017785
- Hardness: 9 on the Mohs scale
This 1.62 ct round Ceylon blue sapphire has been hand-selected for the consistency and vividness of its blue — the quality that makes this configuration a reliable and consistently satisfying center stone choice.
Why Customers Love This Gemstone
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Ceylon Benchmark: The origin most associated with fine blue sapphire, confirmed by GIA.
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Round Brilliance: Strong light return — a vivid way to show blue.
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Standard Compatibility: Fits any solitaire or halo setting without custom work.
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Trusted Source: Treatment and origin independently confirmed by GIA Report #2245017785.
Owning this 1.62 ct round Ceylon blue sapphire means choosing the most reliable configuration in the blue sapphire category — the one that consistently delivers what buyers expect.
Perfect Uses for this 1.62 ct Blue Sapphire
- Engagement ring center stone
- Pendant solitaire in any metal
- Halo ring center stone
- September birthstone jewelry
- Anniversary gift at the fine jewelry level
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