CaratHunter
Plans
Radiant|Lab Grown|IGI

1.51ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1

Diamond specifications and retailer prices

From $873 NZD
As of November 6, 2026
Save $2,607 NZD (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $3,480 NZD at NZ Jewellers · As of November 6, 2026
View at NZ Jewellers

About this 1.51ct lab-grown radiant diamond

This 1.51ct lab-grown radiant sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI. Listed at 5 retailers as of November 6, 2026, with prices from $873 to $3,480, a $2,607 spread on the same certified stone. NZ Jewellers lists it at $3,480. 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

1.51
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.28 × 5.64 × 3.87 mm
L/W Ratio1.29
Top View
7.28 mm5.64 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 66.5%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 68.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,480 NZD|Low: $626 NZD|High: $3,480 NZD|Avg: $1,359 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7$626 NZD
Retailer 5$873 NZD
Retailer 4$978 NZD
Retailer 3$1,082 NZD
Retailer 2$1,198 NZD
Retailer 6$2,019 NZD
NZ Jewellers$3,480 NZD

39 data points across 7 retailers

5 retailers$873 NZD to $3,480 NZD

A
Cheapest Retailer
-
$873 NZD
B+
Retailer 2
-
$978 NZD
View
B+
Retailer 3
-
$1,082 NZD
View
B+
Retailer 4
-
$1,198 NZD
View
Most Expensive
C
NZ Jewellers
6ee64d95-f7fd-4ec1-bf28-e54896464641 · Nov 6
$3,480 NZD
$1,929 USD
View
4 more retailers have this diamond
Prices start from $873 NZDSave up to $2,607 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
1.51ct Radiant
$873 NZD