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Round|Lab Grown|IGI

1.21ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG660459586

Certificate IGI LG660459586

Diamond specifications and retailer prices

From €707 EUR
$790 USD
As of October 30, 2026
Save €474 EUR (40%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €1,182 EUR at Jared · As of October 30, 2026
View at Jared

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG660459586 or 660459586. Listed at 3 retailers as of October 30, 2026, with prices from €707 to €1,182, a €474 spread on the same certified stone. Jared lists it at €1,182. 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
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG660459586
Dimensions6.78 × 6.84 mm
L/W Ratio1.01
Top View
6.78 mm6.84 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660459586
Side View
Table 57.0%CrownGirdle: MediumPavilionCulet: NoneDepth 62.3%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 30
Current: €1,182 EUR|Low: €707 EUR|High: €1,182 EUR|Avg: €920 EUR
Jared
Retailer 2
Retailer 3
July 10, 2026
Retailer 2€707 EUR
Retailer 3€707 EUR
Jared€1,182 EUR

9 data points across 3 retailers

3 retailers€707 EUR to €1,182 EUR

B
Cheapest Retailer
-
€707 EUR
$790 USD
B
Retailer 2
-
€707 EUR
$790 USD
View
Most Expensive
B
Jared
154699731 · Oct 30
€1,182 EUR
$1,320 USD
View
2 more retailers have this diamond
Prices start from €707 EURSave up to €474 EUR

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
€707 EUR