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Radiant|Lab Grown|IGI

1.21ct D IF Radiant Lab Grown Diamond

VG • D/IF • IGI LG815606188

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

Certificate IGI LG815606188

Diamond specifications and retailer prices

From $379 AUD
As of November 4, 2026
Save $1,076 AUD (74%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,705 AUD at MOH London · As of October 26, 2026
View at MOH London

About this 1.21ct lab-grown radiant diamond

This 1.21ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG815606188 or 815606188. Listed at 15 retailers as of November 4, 2026, with a 284% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.8°
Pavilion angle36.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG815606188
Dimensions7.38 × 5.23 × 3.64 mm
L/W Ratio1.41
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.38 mm5.23 mm1.21 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG815606188
Side View
Table 66.0%Crown 41.8°Girdle: STK-THKPavilion 36.1°Culet: NoneDepth 69.6%

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 4
Current: $1,705 AUD|Low: $379 AUD|High: $1,754 AUD|Avg: $1,029 AUD|-2.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 13$379 AUD
Retailer 9$391 AUD
Retailer 7$564 AUD
Retailer 4$727 AUD
Retailer 3$760 AUD
Retailer 8$783 AUD
Retailer 6$870 AUD
Retailer 14$1,029 AUD
Retailer 5$1,091 AUD
Retailer 11$1,353 AUD
Retailer 12$1,356 AUD
Retailer 2$1,419 AUD
Retailer 10$1,454 AUD
MOH London$1,705 AUD

24 data points across 14 retailers

15 retailers$379 AUD to $1,454 AUD

A
Cheapest Retailer
-
$379 AUD
Final sale: no returns
A
Retailer 2
-
$391 AUD
View
A
Retailer 3
-
$564 AUD
View
A
Retailer 4
-
$727 AUD
View
A
Retailer 5
-
$760 AUD
View
A
Retailer 6
-
$783 AUD
View
A
Retailer 7
-
$870 AUD
View
B+
Retailer 8
-
$1,029 AUD
View
B+
Retailer 9
-
$1,091 AUD
View
B+
Retailer 10
-
$1,353 AUD
View
B+
Retailer 11
-
$1,356 AUD
View
B+
Retailer 12
-
$1,419 AUD
View
B+
Retailer 13
-
$1,454 AUD
View
Retailer 14
-
$1,694 AUD
View
Price last confirmed 32 days ago
Most Expensive
MOH London
LG815606188 · Oct 26
$1,705 AUD
£940 GBP
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from $379 AUDSave up to $1,076 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.

A
1.21ct Radiant
$379 AUD