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Round|Lab Grown|GIA

1.21ct F SI1 Round Lab Grown Diamond

EX • F/SI1

Diamond specifications and retailer prices

From €635 EUR
$709 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: €635 EUR at Blue Nile
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Blue Nile

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.21
Carat
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabGIA
Dimensions6.84 × 6.88 × 4.22 mm
L/W Ratio1.01
Top View
6.84 mm6.88 mm1.21 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 61.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 31
Current: €635 EUR|Low: €635 EUR|High: €7,229 EUR|Avg: €4,819 EUR
Blue Nile
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Blue Nile€635 EUR
Retailer 4€4,149 EUR
Retailer 2€4,436 EUR
Retailer 3€7,229 EUR

17 data points across 4 retailers

1 retailer

B
Blue Nile
27800968 · Oct 31
€635 EUR
$709 USD
View

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B
1.21ct Round
€635 EUR