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1.31ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451055654

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055654

Diamond specifications and retailer prices

From HK$5,884 HKD
$750 USD
As of October 31, 2026
Save HK$20,042 HKD (77%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$25,926 HKD at MOH London · As of November 1, 2026
View at MOH London

About this 1.31ct lab-grown round diamond

This 1.31ct lab-grown round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451055654 or 451055654. Listed at 11 retailers as of October 31, 2026, with prices from HK$5,884 to HK$25,926, a HK$20,042 spread on the same certified stone. MOH London lists it at HK$25,926. 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055654
Dimensions7.11 × 7.14 × 4.32 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.11 mm7.14 mm1.31 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055654
Side View
Table 56.0%Crown 32.2°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 60.8%

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$25,926 HKD|Low: HK$5,720 HKD|High: HK$26,235 HKD|Avg: HK$11,471 HKD|-1.0%
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$5,884 HKD
Retailer 5HK$5,963 HKD
Retailer 9HK$6,669 HKD
Retailer 6HK$6,912 HKD
Retailer 10HK$6,912 HKD
Retailer 8HK$8,316 HKD
Retailer 11HK$10,851 HKD
Retailer 7HK$11,188 HKD
Retailer 4HK$16,445 HKD
Retailer 3HK$19,789 HKD
MOH LondonHK$25,926 HKD

16 data points across 11 retailers

11 retailersHK$5,884 HKD to HK$25,926 HKD

A
Cheapest Retailer
-
HK$5,884 HKD
$750 USD
A
Retailer 2
-
HK$5,963 HKD
$760 USD
View
A
Retailer 3
-
HK$6,488 HKD
$827 USD
View
B+
Retailer 4
-
HK$6,669 HKD
$850 USD
View
Final sale: no returns
B+
Retailer 5
-
HK$6,912 HKD
$881 USD
View
Retailer 6
-
HK$6,912 HKD
$881 USD
View
Price last confirmed 20 days ago
B+
Retailer 7
-
HK$8,316 HKD
$1,060 USD
View
B
Retailer 8
-
HK$11,188 HKD
$1,426 USD
View
B
Retailer 9
-
HK$16,445 HKD
$2,096 USD
View
B
Retailer 10
-
HK$19,442 HKD
$2,478 USD
View
Most Expensive
B
MOH London
LG451055654 · Nov 1
HK$25,926 HKD
£2,602 GBP
View
10 more retailers have this diamond
Prices start from HK$5,884 HKDSave up to HK$20,042 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
1.31ct Round
HK$5,884 HKD