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Round|Lab Grown|IGI

5.51ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG709522904

Shape and cutting style on the report: Round brilliant

Certificate IGI LG709522904

Diamond specifications and retailer prices

From €591 EUR
$660 USD
As of October 29, 2026
Save €2,310 EUR (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €4,747 EUR at Rare Carat · As of September 9, 2026
View at Rare Carat

About this 5.51ct lab-grown round diamond

This 5.51ct lab-grown round sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG709522904 or 709522904. Listed at 17 retailers as of October 29, 2026, with a 391% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

5.51
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.8°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG709522904
Dimensions11.39 × 11.30 × 6.87 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.39 mm11.30 mm5.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG709522904
Side View
Table 60.0%Crown 33.8°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 60.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: €1,092 EUR|Low: €567 EUR|High: €2,920 EUR|Avg: €1,181 EUR|+4.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 13€591 EUR
Retailer 6€643 EUR
Retailer 3€685 EUR
Retailer 14€685 EUR
Retailer 2€802 EUR
Retailer 10€841 EUR
Retailer 8€911 EUR
Retailer 12€1,031 EUR
Retailer 5€1,045 EUR
Retailer 1€1,092 EUR
Retailer 7€1,142 EUR
Retailer 11€1,750 EUR
Retailer 4€2,306 EUR
Retailer 9€2,901 EUR

41 data points across 14 retailers

17 retailers€591 EUR to €2,901 EUR

A
Cheapest Retailer
-
€591 EUR
$660 USD
A
Retailer 2
-
€643 EUR
$718 USD
View
A
Retailer 3
-
€685 EUR
$765 USD
View
Retailer 4
-
€685 EUR
$765 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
€802 EUR
HK$7,000 HKD
View
A
Retailer 6
-
€841 EUR
$940 USD
View
A
Retailer 7
-
€911 EUR
£802 GBP
View
B+
Retailer 8
-
€1,031 EUR
$1,152 USD
View
A
Retailer 9
-
€1,045 EUR
$1,168 USD
View
A
Retailer 10
-
€1,092 EUR
£960 GBP
View
A
Retailer 11
-
€1,142 EUR
View
B+
Retailer 12
-
€1,750 EUR
$1,955 USD
View
B+
Retailer 13
-
€1,925 EUR
$2,151 USD
View
B
Retailer 14
-
€2,306 EUR
SGD 3,481 SGD
View
B
Retailer 15
-
€2,330 EUR
$2,603 USD
View
B
Retailer 16
-
€2,901 EUR
£2,552 GBP
View
Most Expensive
Rare Carat
MA-34300_l_709522904 · Sep 9
€4,747 EUR
$5,304 USD
View
Price last confirmed 52 days ago
16 more retailers have this diamond
Prices start from €591 EURSave up to €2,310 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
5.51ct Round
€591 EUR