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1.21ct G SI1 Round Lab Grown Diamond

EX • G/SI1 • IGI LG598387229

Shape and cutting style on the report: Round brilliant

Certificate IGI LG598387229

Diamond specifications and retailer prices

From HK$3,624 HKD
As of November 1, 2026
Save HK$8,242 HKD (69%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: HK$11,866 HKD at MOH London · As of November 5, 2026
View at MOH London

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG598387229 or 598387229. Listed at 9 retailers as of November 1, 2026, with prices from HK$3,624 to HK$11,866, a HK$8,242 spread on the same certified stone. MOH London lists it at HK$11,866. 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

1.21
Carat
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG598387229
Dimensions6.94 × 6.88 × 4.17 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.94 mm6.88 mm1.21 ctG / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG598387229
Side View
Table 60.0%Crown 32.7°Girdle: MediumPavilion 41.2°Culet: NoneDepth 60.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: HK$11,866 HKD|Low: HK$1,914 HKD|High: HK$12,036 HKD|Avg: HK$4,500 HKD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11HK$2,299 HKD
Retailer 12HK$2,683 HKD
Retailer 3HK$2,777 HKD
Retailer 4HK$2,926 HKD
Retailer 10HK$2,965 HKD
Retailer 8HK$3,624 HKD
Retailer 5HK$4,197 HKD
Retailer 6HK$4,315 HKD
Retailer 9HK$4,840 HKD
Retailer 2HK$5,178 HKD
Retailer 7HK$9,116 HKD
MOH LondonHK$11,866 HKD

37 data points across 12 retailers

9 retailersHK$3,624 HKD to HK$11,866 HKD

B+
Cheapest Retailer
-
HK$3,624 HKD
B+
Retailer 2
-
HK$4,197 HKD
View
B
Retailer 3
-
HK$4,315 HKD
View
B+
Retailer 4
-
HK$4,840 HKD
View
B
Retailer 5
-
HK$5,178 HKD
View
B
Retailer 6
-
HK$9,116 HKD
View
Retailer 7
-
HK$9,540 HKD
View
Price last confirmed 46 days ago
B
Retailer 8
-
HK$9,908 HKD
View
Most Expensive
B
MOH London
LG598387229 · Nov 5
HK$11,866 HKD
£1,191 GBP
View
8 more retailers have this diamond
Prices start from HK$3,624 HKDSave up to HK$8,242 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.

B+
1.21ct Round
HK$3,624 HKD