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Round|Lab Grown|IGI

1.31ct I SI1 Round Lab Grown Diamond

ID • I/SI1 • IGI LG451055666

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451055666

Diamond specifications and retailer prices

From HK$5,806 HKD
$740 USD
As of October 31, 2026
Save HK$20,260 HKD (78%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$26,066 HKD at MOH London · As of October 29, 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 LG451055666 or 451055666. Listed at 11 retailers as of October 29, 2026, with prices from HK$5,806 to HK$26,066, a HK$20,260 spread on the same certified stone. MOH London lists it at HK$26,066. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451055666
Dimensions6.96 × 6.97 × 4.35 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.96 mm6.97 mm1.31 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451055666
Side View
Table 55.0%Crown 35.9°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.5%

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 31
Current: HK$26,066 HKD|Low: HK$5,720 HKD|High: HK$26,265 HKD|Avg: HK$10,989 HKD|+0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 30, 2026
Retailer 2HK$5,806 HKD
Retailer 4HK$5,963 HKD
Retailer 8HK$6,669 HKD
Retailer 6HK$6,912 HKD
Retailer 5HK$8,316 HKD
Retailer 9HK$10,851 HKD
Retailer 7HK$11,188 HKD
Retailer 3HK$16,445 HKD
MOH LondonHK$26,066 HKD

15 data points across 9 retailers

11 retailersHK$5,806 HKD to HK$26,066 HKD

A
Cheapest Retailer
-
HK$5,806 HKD
$740 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
LG451055666 · Oct 29
HK$26,066 HKD
£2,616 GBP
View
10 more retailers have this diamond
Prices start from HK$5,806 HKDSave up to HK$20,260 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$5,806 HKD