CaratHunter
Plans
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 $1,084 AUD
As of November 6, 2026
Save $2,452 AUD (69%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,939 AUD 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: $4,939 AUD|Low: $1,041 AUD|High: $4,998 AUD|Avg: $2,082 AUD|-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 6$1,084 AUD
Retailer 11$1,180 AUD
Retailer 3$1,212 AUD
Retailer 8$1,257 AUD
Retailer 4$1,514 AUD
Retailer 7$1,572 AUD
Retailer 2$1,998 AUD
Retailer 10$2,036 AUD
Retailer 5$3,097 AUD
Retailer 9$3,537 AUD
MOH London$4,939 AUD

43 data points across 11 retailers

13 retailers$1,084 AUD to $3,537 AUD

B+
Cheapest Retailer
-
$1,084 AUD
B+
Retailer 2
-
$1,180 AUD
View
B
Retailer 3
-
$1,212 AUD
View
Final sale: no returns
B
Retailer 4
-
$1,257 AUD
View
Retailer 5
-
$1,257 AUD
View
Price last confirmed 26 days ago
B
Retailer 6
-
$1,514 AUD
View
B
Retailer 7
-
$1,572 AUD
View
B
Retailer 8
-
$1,998 AUD
View
B
Retailer 9
-
$2,036 AUD
View
B
Retailer 10
-
$3,097 AUD
View
B
Retailer 11
-
$3,537 AUD
View
Retailer 12
-
$3,911 AUD
View
Price under review
Most Expensive
MOH London
LG512205072 · Nov 3
$4,939 AUD
£2,672 GBP
View
Price under review
12 more retailers have this diamond
Prices start from $1,084 AUDSave up to $2,452 AUD

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
$1,084 AUD