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1.22ct E SI1 Round Lab Grown Diamond

EX • E/SI1 • IGI LG844601830

Shape and cutting style on the report: Round brilliant

Certificate IGI LG844601830

Diamond specifications and retailer prices

From €283 EUR
£249 GBP
As of October 27, 2026
Save €227 EUR (44%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: €510 EUR at Brilliant Earth · As of October 26, 2026
View at Brilliant Earth

About this 1.22ct lab-grown round diamond

This 1.22ct 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 LG844601830 or 844601830. Listed at 2 retailers as of October 26, 2026, with prices from €283 to €510, a €227 spread on the same certified stone. Brilliant Earth lists it at €510. 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

1.22
Carat
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG844601830
Dimensions6.77 × 6.82 × 4.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.77 mm6.82 mm1.22 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG844601830
Side View
Table 58.0%Crown 35.1°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: €510 EUR|Low: €147 EUR|High: €510 EUR|Avg: €358 EUR
Brilliant Earth
Retailer 2
Retailer 3
October 27, 2026
Retailer 3€147 EUR
Retailer 2€283 EUR
Brilliant Earth€510 EUR

9 data points across 3 retailers

2 retailers€283 EUR to €510 EUR

A
Cheapest Retailer
-
€283 EUR
£249 GBP
Most Expensive
B
Brilliant Earth
21781374A · Oct 26
€510 EUR
$570 USD
View
1 more retailer has this diamond
Prices start from €283 EURSave up to €227 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.

A
1.22ct Round
€283 EUR