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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 HK$5,178 HKD
$660 USD
As of October 29, 2026
Save HK$20,250 HKD (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: HK$41,612 HKD 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: HK$10,009 HKD|Low: HK$4,966 HKD|High: HK$25,598 HKD|Avg: HK$10,256 HKD|+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 13HK$5,178 HKD
Retailer 6HK$5,633 HKD
Retailer 3HK$6,002 HKD
Retailer 14HK$6,002 HKD
Retailer 2HK$7,030 HKD
Retailer 10HK$7,375 HKD
Retailer 8HK$7,989 HKD
Retailer 12HK$9,038 HKD
Retailer 5HK$9,164 HKD
Retailer 7HK$9,568 HKD
Retailer 1HK$10,009 HKD
Retailer 11HK$15,338 HKD
Retailer 4HK$20,210 HKD
Retailer 9HK$25,428 HKD

40 data points across 14 retailers

17 retailersHK$5,178 HKD to HK$25,428 HKD

A
Cheapest Retailer
-
HK$5,178 HKD
$660 USD
A
Retailer 2
-
HK$5,633 HKD
$718 USD
View
A
Retailer 3
-
HK$6,002 HKD
$765 USD
View
Retailer 4
-
HK$6,002 HKD
$765 USD
View
Price last confirmed 15 days ago
A
Retailer 5
-
HK$7,030 HKD
View
A
Retailer 6
-
HK$7,375 HKD
$940 USD
View
A
Retailer 7
-
HK$7,989 HKD
£802 GBP
View
B+
Retailer 8
-
HK$9,038 HKD
$1,152 USD
View
A
Retailer 9
-
HK$9,164 HKD
$1,168 USD
View
A
Retailer 10
-
HK$9,568 HKD
£960 GBP
View
A
Retailer 11
-
HK$10,009 HKD
€1,215 EUR
View
B+
Retailer 12
-
HK$15,338 HKD
$1,955 USD
View
B+
Retailer 13
-
HK$16,876 HKD
$2,151 USD
View
B
Retailer 14
-
HK$20,210 HKD
SGD 3,481 SGD
View
B
Retailer 15
-
HK$20,422 HKD
$2,603 USD
View
B
Retailer 16
-
HK$25,428 HKD
£2,552 GBP
View
Most Expensive
Rare Carat
MA-34300_l_709522904 · Sep 9
HK$41,612 HKD
$5,304 USD
View
Price last confirmed 52 days ago
16 more retailers have this diamond
Prices start from HK$5,178 HKDSave up to HK$20,250 HKD

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
HK$5,178 HKD