CaratHunter
Plans
Radiant|Lab Grown|IGI

1.21ct E SI1 Radiant Lab Grown Diamond

ID • E/SI1 • IGI LG610313441

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG610313441

Diamond specifications and retailer prices

From HK$5,972 HKD
As of November 5, 2026
Save HK$63 HKD (1%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: HK$6,035 HKD at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant 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 LG610313441 or 610313441. Listed at 2 retailers as of November 5, 2026, with a relatively tight 1% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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 angle43°
Pavilion angle34.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG610313441
Dimensions7.38 × 5.20 × 3.55 mm
L/W Ratio1.42
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
7.38 mm5.20 mm1.21 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG610313441
Side View
Table 63.0%Crown 43°Girdle: MED-STKPavilion 34.9°Culet: NoneDepth 68.3%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
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$6,035 HKD|Low: HK$2,657 HKD|High: HK$6,035 HKD|Avg: HK$4,568 HKD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
January 4, 2026
Retailer 2HK$2,657 HKD
Retailer 4HK$4,028 HKD
Retailer 3HK$5,039 HKD
Brilliant EarthHK$6,035 HKD

11 data points across 4 retailers

2 retailersHK$5,972 HKD to HK$6,035 HKD

B
Cheapest Retailer
-
HK$5,972 HKD
Most Expensive
B
Brilliant Earth
8682685Y · Nov 6
HK$6,035 HKD
$770 USD
View
1 more retailer has this diamond
Prices start from HK$5,972 HKDSave up to HK$63 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 Radiant
HK$5,972 HKD