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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 $470 NZD
As of November 4, 2026
Save $1,343 NZD (74%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,118 NZD 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 286% 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

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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: $2,118 NZD|Low: $470 NZD|High: $2,179 NZD|Avg: $1,282 NZD|-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 5, 2026
Retailer 11$470 NZD
Retailer 9$488 NZD
Retailer 6$706 NZD
Retailer 3$903 NZD
Retailer 14$944 NZD
Retailer 7$977 NZD
Retailer 5$1,080 NZD
Retailer 13$1,277 NZD
Retailer 4$1,355 NZD
Retailer 2$1,680 NZD
Retailer 10$1,684 NZD
Retailer 12$1,769 NZD
Retailer 8$1,813 NZD
MOH London$2,118 NZD

24 data points across 14 retailers

15 retailers$470 NZD to $1,813 NZD

A
Cheapest Retailer
-
$470 NZD
Final sale: no returns
A
Retailer 2
-
$488 NZD
View
A
Retailer 3
-
$706 NZD
View
A
Retailer 4
-
$903 NZD
View
A
Retailer 5
-
$944 NZD
View
A
Retailer 6
-
$977 NZD
View
A
Retailer 7
-
$1,080 NZD
View
B+
Retailer 8
-
$1,277 NZD
View
B+
Retailer 9
-
$1,355 NZD
View
B+
Retailer 10
-
$1,680 NZD
View
B+
Retailer 11
-
$1,684 NZD
View
B+
Retailer 12
-
$1,769 NZD
View
B+
Retailer 13
-
$1,813 NZD
View
Retailer 14
-
$2,104 NZD
View
Price last confirmed 31 days ago
Most Expensive
MOH London
LG815606188 · Oct 26
$2,118 NZD
£940 GBP
View
Price last confirmed 9 days ago
14 more retailers have this diamond
Prices start from $470 NZDSave up to $1,343 NZD

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
$470 NZD