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Round|Lab Grown|IGI

1.21ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG425066489

Shape and cutting style on the report: Round brilliant

Certificate IGI LG425066489

Diamond specifications and retailer prices

From HK$4,786 HKD
As of November 5, 2026
Save HK$31,063 HKD (87%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$35,848 HKD at MOH London · As of November 3, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG425066489 or 425066489. Listed at 13 retailers as of November 3, 2026, with prices from HK$4,786 to HK$35,848, a HK$31,063 spread on the same certified stone. MOH London lists it at HK$35,848. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG425066489
Dimensions6.96 × 6.98 × 4.13 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.96 mm6.98 mm1.21 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG425066489
Side View
Table 58.5%Crown 31.6°GirdlePavilion 40.9°Culet: NoneDepth 59.3%

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$35,848 HKD|Low: HK$4,786 HKD|High: HK$36,327 HKD|Avg: HK$16,464 HKD|-1.1%
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 6HK$4,786 HKD
Retailer 5HK$10,819 HKD
Retailer 11HK$11,776 HKD
Retailer 10HK$12,121 HKD
Retailer 7HK$12,552 HKD
Retailer 9HK$12,552 HKD
Retailer 2HK$16,334 HKD
Retailer 8HK$19,817 HKD
Retailer 4HK$21,268 HKD
Retailer 3HK$23,528 HKD
MOH LondonHK$35,848 HKD

46 data points across 11 retailers

13 retailersHK$4,786 HKD to HK$35,848 HKD

A
Cheapest Retailer
-
HK$4,786 HKD
B+
Retailer 2
-
HK$10,819 HKD
View
B+
Retailer 3
-
HK$11,776 HKD
View
B+
Retailer 4
-
HK$12,121 HKD
View
Final sale: no returns
B+
Retailer 5
-
HK$12,552 HKD
View
Retailer 6
-
HK$12,552 HKD
View
Price last confirmed 25 days ago
B
Retailer 7
-
HK$13,886 HKD
View
B+
Retailer 8
-
HK$16,334 HKD
View
B
Retailer 9
-
HK$19,817 HKD
View
B
Retailer 10
-
HK$21,268 HKD
View
B
Retailer 11
-
HK$22,782 HKD
View
B
Retailer 12
-
HK$23,528 HKD
View
Most Expensive
B
MOH London
LG425066489 · Nov 3
HK$35,848 HKD
£3,598 GBP
View
12 more retailers have this diamond
Prices start from HK$4,786 HKDSave up to HK$31,063 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
1.21ct Round
HK$4,786 HKD