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1.20ct J SI1 Round Lab Grown Diamond

EX • J/SI1 • IGI LG451056607

Shape and cutting style on the report: Round brilliant

Certificate IGI LG451056607

Diamond specifications and retailer prices

From HK$5,413 HKD
As of November 5, 2026
Save HK$27,097 HKD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$32,511 HKD at MOH London · As of November 5, 2026
View at MOH London

About this 1.2ct lab-grown round diamond

This 1.2ct lab-grown round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG451056607 or 451056607. Listed at 13 retailers as of November 5, 2026, with prices from HK$5,413 to HK$32,511, a HK$27,097 spread on the same certified stone. MOH London lists it at HK$32,511. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.2°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG451056607
Dimensions6.85 × 6.89 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.85 mm6.89 mm1.20 ctJ / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG451056607
Side View
Table 60.0%Crown 32.2°GirdlePavilion 41.5°Culet: NoneDepth 60.6%

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$32,511 HKD|Low: HK$5,413 HKD|High: HK$32,989 HKD|Avg: HK$13,706 HKD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 5HK$5,413 HKD
Retailer 6HK$8,747 HKD
Retailer 11HK$9,516 HKD
Retailer 10HK$9,799 HKD
Retailer 7HK$10,144 HKD
Retailer 9HK$10,144 HKD
Retailer 2HK$11,642 HKD
Retailer 8HK$16,138 HKD
Retailer 4HK$17,244 HKD
Retailer 3HK$19,017 HKD
MOH LondonHK$32,511 HKD

45 data points across 11 retailers

13 retailersHK$5,413 HKD to HK$32,511 HKD

A
Cheapest Retailer
-
HK$5,413 HKD
B+
Retailer 2
-
HK$8,747 HKD
View
B+
Retailer 3
-
HK$9,516 HKD
View
B+
Retailer 4
-
HK$9,799 HKD
View
Final sale: no returns
Retailer 5
-
HK$10,144 HKD
View
Price last confirmed 25 days ago
B+
Retailer 6
-
HK$10,144 HKD
View
B+
Retailer 7
-
HK$11,493 HKD
View
B+
Retailer 8
-
HK$11,642 HKD
View
B
Retailer 9
-
HK$16,138 HKD
View
B
Retailer 10
-
HK$17,244 HKD
View
B
Retailer 11
-
HK$19,017 HKD
View
B
Retailer 12
-
HK$20,578 HKD
View
Most Expensive
B
MOH London
LG451056607 · Nov 5
HK$32,511 HKD
£3,263 GBP
View
12 more retailers have this diamond
Prices start from HK$5,413 HKDSave up to HK$27,097 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
1.20ct Round
HK$5,413 HKD