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Radiant|Lab Grown|IGI

4.51ct G SI1 Radiant Lab Grown Diamond

GD • G/SI1 • IGI LG671401655

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

Certificate IGI LG671401655

Diamond specifications and retailer prices

From HK$8,120 HKD
$1,035 USD
As of November 1, 2026
Save HK$14,711 HKD (64%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: HK$22,831 HKD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 4.51ct lab-grown radiant diamond

This 4.51ct lab-grown radiant sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by IGI LG671401655 or 671401655. Listed at 4 retailers as of November 1, 2026, with prices from HK$8,120 to HK$22,831, a HK$14,711 spread on the same certified stone. Rare Carat lists it at HK$22,831. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.51
Carat
G
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.6°
Pavilion angle33.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG671401655
Dimensions11.44 × 8.10 × 5.46 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.44 mm8.10 mm4.51 ctG / SI1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG671401655
Side View
Table 68.0%Crown 47.6°Girdle: THK-VTKPavilion 33.7°Culet: NoneDepth 67.4%

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 1
Current: HK$22,831 HKD|Low: HK$5,600 HKD|High: HK$23,446 HKD|Avg: HK$10,857 HKD|-2.6%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6HK$5,600 HKD
Retailer 7HK$6,473 HKD
Retailer 5HK$7,901 HKD
Retailer 4HK$8,120 HKD
Retailer 3HK$8,182 HKD
Retailer 2HK$21,931 HKD
Rare CaratHK$22,831 HKD

6 data points across 7 retailers

4 retailersHK$8,120 HKD to HK$22,831 HKD

B
Cheapest Retailer
-
HK$8,120 HKD
$1,035 USD
A
Retailer 2
-
HK$8,182 HKD
£821 GBP
View
B
Retailer 3
-
HK$21,931 HKD
£2,201 GBP
View
Most Expensive
C
Rare Carat
ABC3-19A_l_671401655 · Nov 1
HK$22,831 HKD
$2,910 USD
View
3 more retailers have this diamond
Prices start from HK$8,120 HKDSave up to HK$14,711 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
4.51ct Radiant
HK$8,120 HKD