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Radiant|Lab Grown|IGI

1.25ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG512205072

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

Certificate IGI LG512205072

Diamond specifications and retailer prices

From HK$5,839 HKD
As of November 6, 2026
Save HK$13,206 HKD (69%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$26,596 HKD at MOH London · As of November 3, 2026
View at MOH London

About this 1.25ct lab-grown radiant diamond

This 1.25ct lab-grown radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG512205072 or 512205072. Listed at 13 retailers as of November 6, 2026, with a 226% 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

1.25
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle46.7°
Pavilion angle29.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG512205072
Dimensions7.31 × 5.41 × 3.51 mm
L/W Ratio1.35
Culet sizePointed
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
7.31 mm5.41 mm1.25 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG512205072
Side View
Table 66.0%Crown 46.7°Girdle: MED-STKPavilion 29.7°Culet: NoneDepth 64.9%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: HK$26,596 HKD|Low: HK$5,604 HKD|High: HK$26,914 HKD|Avg: HK$11,211 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$5,839 HKD
Retailer 11HK$6,356 HKD
Retailer 3HK$6,529 HKD
Retailer 8HK$6,772 HKD
Retailer 4HK$8,151 HKD
Retailer 7HK$8,464 HKD
Retailer 2HK$10,761 HKD
Retailer 10HK$10,965 HKD
Retailer 5HK$16,678 HKD
Retailer 9HK$19,045 HKD
MOH LondonHK$26,596 HKD

43 data points across 11 retailers

13 retailersHK$5,839 HKD to HK$19,045 HKD

B+
Cheapest Retailer
-
HK$5,839 HKD
B+
Retailer 2
-
HK$6,356 HKD
View
B
Retailer 3
-
HK$6,529 HKD
View
Final sale: no returns
B
Retailer 4
-
HK$6,772 HKD
View
Retailer 5
-
HK$6,772 HKD
View
Price last confirmed 26 days ago
B
Retailer 6
-
HK$8,151 HKD
View
B
Retailer 7
-
HK$8,464 HKD
View
B
Retailer 8
-
HK$10,761 HKD
View
B
Retailer 9
-
HK$10,965 HKD
View
B
Retailer 10
-
HK$16,678 HKD
View
B
Retailer 11
-
HK$19,045 HKD
View
Retailer 12
-
HK$21,059 HKD
View
Price under review
Most Expensive
MOH London
LG512205072 · Nov 3
HK$26,596 HKD
£2,672 GBP
View
Price under review
12 more retailers have this diamond
Prices start from HK$5,839 HKDSave up to HK$13,206 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+
1.25ct Radiant
HK$5,839 HKD