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Radiant|Lab Grown|IGI

1.51ct D SI1 Radiant Lab Grown Diamond

EX • D/SI1

Diamond specifications and retailer prices

From €433 EUR
As of November 6, 2026
Save €1,294 EUR (75%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: €1,728 EUR 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 €433 to €1,728, a €1,294 spread on the same certified stone. NZ Jewellers lists it at €1,728. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €1,728 EUR|Low: €311 EUR|High: €1,728 EUR|Avg: €675 EUR
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 7€311 EUR
Retailer 5€433 EUR
Retailer 4€485 EUR
Retailer 3€537 EUR
Retailer 2€595 EUR
Retailer 6€1,002 EUR
NZ Jewellers€1,728 EUR

39 data points across 7 retailers

5 retailers€433 EUR to €1,728 EUR

A
Cheapest Retailer
-
€433 EUR
B+
Retailer 2
-
€485 EUR
View
B+
Retailer 3
-
€537 EUR
View
B+
Retailer 4
-
€595 EUR
View
Most Expensive
C
NZ Jewellers
6ee64d95-f7fd-4ec1-bf28-e54896464641 · Nov 6
€1,728 EUR
$1,929 USD
View
4 more retailers have this diamond
Prices start from €433 EURSave up to €1,294 EUR

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
€433 EUR