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Radiant|Lab Grown|IGI

1.21ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG534238077

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

Certificate IGI LG534238077

Diamond specifications and retailer prices

From HK$1,528 HKD
As of November 6, 2026
Save HK$6,364 HKD (81%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: HK$8,417 HKD at B2C Jewels · As of October 26, 2026
View at B2C Jewels

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant 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 LG534238077 or 534238077. Listed at 18 retailers as of November 5, 2026, with a 416% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.4°
Pavilion angle30.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG534238077
Dimensions7.55 × 5.24 × 3.43 mm
L/W Ratio1.44
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.55 mm5.24 mm1.21 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG534238077
Side View
Table 64.0%Crown 41.4°Girdle: Slightly ThickPavilion 30.1°Culet: NoneDepth 65.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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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$8,417 HKD|Low: HK$1,528 HKD|High: HK$8,417 HKD|Avg: HK$4,135 HKD|+4.6%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11HK$1,528 HKD
Retailer 10HK$1,693 HKD
Retailer 3HK$2,289 HKD
Retailer 2HK$2,994 HKD
Retailer 8HK$3,096 HKD
Retailer 7HK$3,135 HKD
Retailer 9HK$4,820 HKD
Retailer 6HK$5,745 HKD
Retailer 4HK$6,583 HKD
Retailer 5HK$7,892 HKD
B2C JewelsHK$8,417 HKD

42 data points across 11 retailers

18 retailersHK$1,528 HKD to HK$7,892 HKD

Retailer 1
-
HK$1,309 HKD
Price last confirmed 33 days ago
A
Retailer 2
-
HK$1,528 HKD
View
Final sale: no returns
Retailer 3
-
HK$1,669 HKD
View
Price last confirmed 43 days ago
Retailer 4
-
HK$1,693 HKD
View
Price last confirmed 35 days ago
B+
Retailer 5
-
HK$2,289 HKD
View
A
Retailer 6
-
HK$2,994 HKD
View
A
Retailer 7
-
HK$3,096 HKD
View
A
Retailer 8
-
HK$3,135 HKD
View
B+
Retailer 9
-
HK$4,295 HKD
View
Retailer 10
-
HK$4,820 HKD
View
Price last confirmed 31 days ago
B
Retailer 11
-
HK$4,906 HKD
View
B+
Retailer 12
-
HK$5,173 HKD
View
B
Retailer 13
-
HK$5,549 HKD
View
B
Retailer 14
-
HK$5,745 HKD
View
B
Retailer 15
-
HK$5,862 HKD
View
B
Retailer 16
-
HK$6,583 HKD
View
B
Retailer 17
-
HK$7,892 HKD
View
Most Expensive
B2C Jewels
20884917 · Oct 26
HK$8,417 HKD
$1,074 USD
View
Price last confirmed 11 days ago
17 more retailers have this diamond
Prices start from HK$1,528 HKDSave up to HK$6,364 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 Radiant
HK$1,528 HKD