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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 $660 USD
As of October 29, 2026
Save $2,581 USD (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $5,304 USD 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

How it works →
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: $1,276 USD|Low: $633 USD|High: $3,263 USD|Avg: $1,307 USD|+2.3%
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
October 31, 2026
Retailer 13$660 USD
Retailer 6$718 USD
Retailer 3$765 USD
Retailer 14$765 USD
Retailer 2$896 USD
Retailer 10$940 USD
Retailer 8$1,018 USD
Retailer 12$1,152 USD
Retailer 5$1,168 USD
Retailer 7$1,220 USD
Retailer 1$1,276 USD
Retailer 11$1,955 USD
Retailer 4$2,576 USD
Retailer 9$3,241 USD

40 data points across 14 retailers

17 retailers$660 USD to $3,241 USD

A
Cheapest Retailer
-
$660 USD
A
Retailer 2
-
$718 USD
View
A
Retailer 3
-
$765 USD
View
Retailer 4
-
$765 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$896 USD
HK$7,000 HKD
View
A
Retailer 6
-
$940 USD
View
A
Retailer 7
-
$1,018 USD
£802 GBP
View
B+
Retailer 8
-
$1,152 USD
View
A
Retailer 9
-
$1,168 USD
View
A
Retailer 10
-
$1,220 USD
£960 GBP
View
A
Retailer 11
-
$1,276 USD
€1,215 EUR
View
B+
Retailer 12
-
$1,955 USD
View
B+
Retailer 13
-
$2,151 USD
View
B
Retailer 14
-
$2,576 USD
SGD 3,481 SGD
View
B
Retailer 15
-
$2,603 USD
View
B
Retailer 16
-
$3,241 USD
£2,552 GBP
View
Most Expensive
Rare Carat
MA-34300_l_709522904 · Sep 9
$5,304 USD
View
Price last confirmed 52 days ago
16 more retailers have this diamond
Prices start from $660 USDSave up to $2,581 USD

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
$660 USD