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Radiant|Natural|GIA

1.51ct I SI2 Radiant Natural Diamond

ID • I/SI2 • GIA 1518170862

Certificate GIA 1518170862

Diamond specifications and retailer prices

From €3,570 EUR
£3,141 GBP
As of November 2, 2026
Save €2,807 EUR (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €6,378 EUR at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1518170862. Listed at 6 retailers as of October 30, 2026, with prices from €3,570 to €6,378, a €2,807 spread on the same certified stone. NZ Jewellers lists it at €6,378. 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
I
Color
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.77°
Pavilion angle31.26°
OriginNatural
Grading LabGIA
CertificateGIA 1518170862
Dimensions7.73 × 5.92 × 3.71 mm
L/W Ratio1.31
Girdle conditionSlightly Thick
Key to symbols
Crystal, Twinning Wisp, Feather, Needle
Top View
7.73 mm5.92 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1518170862
Side View
Table 70.0%Crown 44.77°Girdle: MediumPavilion 31.26°Culet: NoneDepth 62.7%

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 2
Current: €6,378 EUR|Low: €3,569 EUR|High: €6,462 EUR|Avg: €4,430 EUR|-1.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 2€3,570 EUR
Retailer 4€3,660 EUR
Retailer 5€3,660 EUR
Retailer 6€3,788 EUR
Retailer 9€3,851 EUR
Retailer 7€4,151 EUR
Retailer 8€4,175 EUR
Retailer 10€4,305 EUR
Retailer 3€6,121 EUR
NZ Jewellers€6,378 EUR

35 data points across 10 retailers

6 retailers€3,570 EUR to €6,378 EUR

A
Cheapest Retailer
-
€3,570 EUR
£3,141 GBP
A
Retailer 2
-
€3,660 EUR
$4,089 USD
View
A
Retailer 3
-
€3,660 EUR
$4,089 USD
View
A
Retailer 4
-
€3,788 EUR
$4,232 USD
View
B+
Retailer 5
-
€6,121 EUR
£5,385 GBP
View
Most Expensive
B
NZ Jewellers
84c6226e-ee67-4228-a4df-b55c55477ffb · Oct 30
€6,378 EUR
$7,125 USD
View
5 more retailers have this diamond
Prices start from €3,570 EURSave up to €2,807 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
€3,570 EUR