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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 $8,437 AUD
As of October 31, 2026
10 retailers carry this diamond
Most expensive: $14,407 AUD 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 10 retailers as of October 31, 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 31
Current: $14,407 AUD|Low: $6,341 AUD|High: $15,406 AUD|Avg: $8,749 AUD|-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$6,341 AUD
Retailer 10$6,563 AUD
Retailer 5$6,603 AUD
Retailer 15$6,867 AUD
Retailer 2$7,239 AUD
Retailer 9$7,299 AUD
Retailer 4$7,310 AUD
Retailer 11$7,524 AUD
Retailer 6$7,559 AUD
Retailer 7$7,587 AUD
Retailer 16$8,009 AUD
Retailer 13$8,157 AUD
Retailer 20$8,260 AUD
Retailer 12$8,437 AUD
Retailer 14$8,495 AUD
Retailer 18$9,220 AUD
Retailer 8$10,442 AUD
Retailer 17$12,844 AUD
Retailer 19$13,503 AUD
NZ Jewellers$14,407 AUD

14 data points across 20 retailers

10 retailers

Retailer 1
-
$6,341 AUD
HK$34,800 HKD
Price last confirmed 34 days ago
Retailer 2
-
$7,239 AUD
€4,843 EUR
View
Price last confirmed 32 days ago
Retailer 3
-
$7,559 AUD
$5,310 USD
View
Price last confirmed 33 days ago
Retailer 4
-
$8,157 AUD
£4,512 GBP
View
Price last confirmed 32 days ago
Retailer 5
-
$8,260 AUD
$5,802 USD
View
Price last confirmed 34 days ago
A
Retailer 6
-
$8,437 AUD
View
Retailer 7
-
$8,495 AUD
View
Price last confirmed 32 days ago
Retailer 8
-
$10,442 AUD
ZAR 118,495 ZAR
View
Price last confirmed 37 days ago
Retailer 9
-
$13,503 AUD
$9,485 USD
View
Price last confirmed 34 days ago
Most Expensive
NZ Jewellers
713935f0-ce7f-4697-ab11-385cbfb65944 · Sep 30
$14,407 AUD
$10,120 USD
View
Price last confirmed 32 days ago
9 more retailers have this diamond
Prices start from $8,437 AUD

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
$8,437 AUD