CaratHunter
Plans
Radiant|Lab Grown|IGI

1.23ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG514255275

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

Certificate IGI LG514255275

Diamond specifications and retailer prices

From $975 AUD
As of November 6, 2026
Save $1,032 AUD (51%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $3,481 AUD at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

About this 1.23ct lab-grown radiant diamond

This 1.23ct 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 LG514255275 or 514255275. Listed at 13 retailers as of November 4, 2026, with a 106% 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

1.23
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.2°
Pavilion angle32.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG514255275
Dimensions7.25 × 5.53 × 3.53 mm
L/W Ratio1.31
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
7.25 mm5.53 mm1.23 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG514255275
Side View
Table 61.5%Crown 41.2°Girdle: Slightly ThickPavilion 32.3°Culet: NoneDepth 63.8%

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: $1,962 AUD|Low: $975 AUD|High: $4,927 AUD|Avg: $2,026 AUD|-0.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3$975 AUD
Retailer 6$1,067 AUD
Retailer 9$1,193 AUD
Retailer 7$1,239 AUD
Retailer 4$1,499 AUD
Retailer 1$1,962 AUD
Retailer 8$2,007 AUD
Retailer 5$3,051 AUD
Retailer 2$4,849 AUD

42 data points across 9 retailers

13 retailers$975 AUD to $2,007 AUD

B+
Cheapest Retailer
-
$975 AUD
B
Retailer 2
-
$1,067 AUD
View
B
Retailer 3
-
$1,161 AUD
View
B
Retailer 4
-
$1,193 AUD
View
Final sale: no returns
B
Retailer 5
-
$1,239 AUD
View
Retailer 6
-
$1,239 AUD
View
Price last confirmed 26 days ago
B
Retailer 7
-
$1,499 AUD
View
B
Retailer 8
-
$1,962 AUD
View
B
Retailer 9
-
$2,007 AUD
View
Retailer 10
-
$3,051 AUD
View
Price under review
Most Expensive
NZ Jewellers
608f19aa-4b90-4042-a34e-5575f5ee5aa6 · Nov 6
$3,481 AUD
$2,392 USD
View
Price under review
10 more retailers have this diamond
Prices start from $975 AUDSave up to $1,032 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+
1.23ct Radiant
$975 AUD