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1.51ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451055596

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055596

Diamond specifications and retailer prices

From HK$6,591 HKD
$840 USD
As of October 31, 2026
Save HK$27,588 HKD (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$34,178 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown round diamond

This 1.51ct lab-grown round sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055596 or 451055596. Listed at 11 retailers as of October 31, 2026, with prices from HK$6,591 to HK$34,178, a HK$27,588 spread on the same certified stone. MOH London lists it at HK$34,178. 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

1.51
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055596
Dimensions7.28 × 7.25 × 4.60 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.28 mm7.25 mm1.51 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055596
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 63.3%

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 31
Current: HK$34,178 HKD|Low: HK$6,591 HKD|High: HK$34,627 HKD|Avg: HK$16,727 HKD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 2HK$6,591 HKD
Retailer 4HK$9,172 HKD
Retailer 7HK$10,263 HKD
Retailer 5HK$10,639 HKD
Retailer 3HK$11,582 HKD
Retailer 8HK$12,005 HKD
Retailer 10HK$15,112 HKD
Retailer 6HK$16,893 HKD
Retailer 9HK$20,957 HKD
Retailer 11HK$30,432 HKD
MOH LondonHK$34,178 HKD

17 data points across 11 retailers

11 retailersHK$6,591 HKD to HK$34,178 HKD

A
Cheapest Retailer
-
HK$6,591 HKD
$840 USD
B+
Retailer 2
-
HK$9,172 HKD
$1,169 USD
View
B+
Retailer 3
-
HK$9,972 HKD
$1,271 USD
View
B+
Retailer 4
-
HK$10,263 HKD
$1,308 USD
View
Final sale: no returns
Retailer 5
-
HK$10,639 HKD
$1,356 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
HK$10,639 HKD
$1,356 USD
View
B+
Retailer 7
-
HK$12,005 HKD
$1,530 USD
View
B
Retailer 8
-
HK$16,893 HKD
$2,153 USD
View
B
Retailer 9
-
HK$19,937 HKD
$2,541 USD
View
B
Retailer 10
-
HK$20,957 HKD
$2,671 USD
View
Most Expensive
B
MOH London
LG451055596 · Nov 1
HK$34,178 HKD
£3,430 GBP
View
10 more retailers have this diamond
Prices start from HK$6,591 HKDSave up to HK$27,588 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
1.51ct Round
HK$6,591 HKD