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Radiant|Natural|GIA

1.51ct D SI1 Radiant Natural Diamond

EX • D/SI1 • GIA 6555417728

Certificate GIA 6555417728

Diamond specifications and retailer prices

From €5,324 EUR
A$9,118 AUD
As of October 29, 2026
11 retailers carry this diamond
Most expensive: €9,090 EUR at NZ Jewellers · As of September 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555417728. Listed at 11 retailers as of October 29, 2026. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6555417728
Dimensions7.54 × 5.78 × 3.94 mm
L/W Ratio1.30
Girdle conditionPolished
Top View
7.54 mm5.78 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6555417728
Side View
Table 67.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.2%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 29
Current: €9,090 EUR|Low: €4,001 EUR|High: €9,721 EUR|Avg: €5,491 EUR|-6.5%
NZ Jewellers
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
September 30, 2026
Retailer 3€4,001 EUR
Retailer 10€4,141 EUR
Retailer 5€4,166 EUR
Retailer 15€4,333 EUR
Retailer 2€4,567 EUR
Retailer 9€4,605 EUR
Retailer 4€4,612 EUR
Retailer 11€4,747 EUR
Retailer 6€4,770 EUR
Retailer 7€4,787 EUR
Retailer 16€5,053 EUR
Retailer 13€5,147 EUR
Retailer 20€5,212 EUR
Retailer 12€5,324 EUR
Retailer 14€5,360 EUR
Retailer 18€5,817 EUR
Retailer 8€6,588 EUR
Retailer 17€8,104 EUR
Retailer 19€8,520 EUR
NZ Jewellers€9,090 EUR

17 data points across 20 retailers

11 retailers

A
Retailer 1
-
€4,001 EUR
HK$34,800 HKD
Price last confirmed 31 days ago
A
Retailer 2
-
€4,141 EUR
$4,610 USD
View
Price last confirmed 30 days ago
A
Retailer 3
-
€4,567 EUR
View
Price last confirmed 29 days ago
A
Retailer 4
-
€4,770 EUR
$5,310 USD
View
Price last confirmed 29 days ago
A
Retailer 5
-
€5,147 EUR
£4,512 GBP
View
Price last confirmed 29 days ago
A
Retailer 6
-
€5,212 EUR
$5,802 USD
View
Price last confirmed 31 days ago
A
Retailer 7
-
€5,324 EUR
A$9,118 AUD
View
A
Retailer 8
-
€5,360 EUR
A$9,180 AUD
View
Price last confirmed 29 days ago
B+
Retailer 9
-
€6,588 EUR
ZAR 118,495 ZAR
View
Price last confirmed 34 days ago
B
Retailer 10
-
€8,520 EUR
$9,485 USD
View
Price last confirmed 30 days ago
Most Expensive
B
NZ Jewellers
713935f0-ce7f-4697-ab11-385cbfb65944 · Sep 30
€9,090 EUR
$10,120 USD
View
Price last confirmed 28 days ago
10 more retailers have this diamond
Prices start from €5,324 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
€5,324 EUR