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Round|Lab Grown|IGI

1.21ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG760578387

Shape and cutting style on the report: Round brilliant

Certificate IGI LG760578387

Diamond specifications and retailer prices

From HK$3,609 HKD
As of November 6, 2026
5 retailers carry this diamond
Most expensive: HK$4,644 HKD at NZ Jewellers · As of September 21, 2026
View at NZ Jewellers

About this 1.21ct lab-grown round diamond

This 1.21ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG760578387 or 760578387. Listed at 5 retailers as of November 6, 2026. 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
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG760578387
Dimensions6.81 × 6.76 × 4.20 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.81 mm6.76 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG760578387
Side View
Table 60.0%Crown 36°Girdle: MED-STKPavilion 40.9°Culet: NoneDepth 61.9%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: HK$3,609 HKD|Low: HK$1,428 HKD|High: HK$6,755 HKD|Avg: HK$3,350 HKD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 3, 2026
Retailer 9HK$1,428 HKD
Retailer 12HK$1,444 HKD
Retailer 6HK$2,346 HKD
Retailer 3HK$2,463 HKD
Retailer 4HK$2,565 HKD
Retailer 11HK$2,871 HKD
Retailer 8HK$3,271 HKD
Retailer 1HK$3,609 HKD
Retailer 5HK$3,648 HKD
Retailer 13HK$3,938 HKD
Retailer 10HK$4,550 HKD
Retailer 2HK$4,786 HKD
Retailer 7HK$6,755 HKD

2 data points across 13 retailers

5 retailers

Retailer 1
-
HK$1,169 HKD
Price last confirmed 45 days ago
Retailer 2
-
HK$1,428 HKD
View
Price last confirmed 45 days ago
B+
Retailer 3
-
HK$3,609 HKD
View
Retailer 4
-
HK$3,648 HKD
View
Price last confirmed 95 days ago
Most Expensive
NZ Jewellers
9c67793d-7da5-4ab2-98d4-ed1cb1733056 · Sep 21
HK$4,644 HKD
$592 USD
View
Price last confirmed 46 days ago
4 more retailers have this diamond
Prices start from HK$3,609 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$3,609 HKD