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1.51ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG451056217

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056217

Diamond specifications and retailer prices

From HK$6,590 HKD
As of November 5, 2026
Save HK$33,573 HKD (84%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$40,162 HKD at MOH London · As of November 3, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056217 or 451056217. Listed at 11 retailers as of November 3, 2026, with prices from HK$6,590 to HK$40,162, a HK$33,573 spread on the same certified stone. MOH London lists it at HK$40,162. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056217
Dimensions7.32 × 7.40 × 4.51 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
7.32 mm7.40 mm1.51 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056217
Side View
Table 61.0%Crown 36°Girdle: MED-STKPavilion 41.1°Culet: NoneDepth 61.4%

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: Nov 5
Current: HK$40,162 HKD|Low: HK$6,590 HKD|High: HK$40,701 HKD|Avg: HK$19,983 HKD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2HK$6,590 HKD
Retailer 3HK$10,779 HKD
Retailer 6HK$12,058 HKD
Retailer 4HK$12,497 HKD
Retailer 7HK$13,847 HKD
Retailer 9HK$17,103 HKD
Retailer 5HK$19,746 HKD
Retailer 8HK$23,300 HKD
Retailer 10HK$35,774 HKD
MOH LondonHK$40,162 HKD

14 data points across 10 retailers

11 retailersHK$6,590 HKD to HK$40,162 HKD

A
Cheapest Retailer
-
HK$6,590 HKD
B+
Retailer 2
-
HK$10,779 HKD
View
B+
Retailer 3
-
HK$11,721 HKD
View
B+
Retailer 4
-
HK$12,058 HKD
View
Final sale: no returns
B+
Retailer 5
-
HK$12,497 HKD
View
Retailer 6
-
HK$12,497 HKD
View
Price last confirmed 25 days ago
B
Retailer 7
-
HK$13,847 HKD
View
B
Retailer 8
-
HK$19,746 HKD
View
B
Retailer 9
-
HK$23,300 HKD
View
B
Retailer 10
-
HK$23,434 HKD
View
Most Expensive
B
MOH London
LG451056217 · Nov 3
HK$40,162 HKD
£4,031 GBP
View
10 more retailers have this diamond
Prices start from HK$6,590 HKDSave up to HK$33,573 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$6,590 HKD