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Radiant|Natural|GIA

1.51ct G SI1 Radiant Natural Diamond

EX • G/SI1 • GIA 5566006502

Certificate GIA 5566006502

Diamond specifications and retailer prices

From $9,265 AUD
$6,493 USD
As of November 1, 2026
Save $5,995 AUD (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $18,313 AUD at NZ Jewellers · As of October 21, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5566006502. Listed at 16 retailers as of November 1, 2026, with a 65% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle47.91°
OriginNatural
Grading LabGIA
CertificateGIA 5566006502
Dimensions7.85 × 5.79 × 3.86 mm
L/W Ratio1.36
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.85 mm5.79 mm1.51 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5566006502
Side View
Table 67.0%Crown 47.91°GirdlePavilionCulet: NoneDepth 66.7%

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 1
Current: $18,313 AUD|Low: $9,265 AUD|High: $19,038 AUD|Avg: $11,817 AUD|-3.8%
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
November 3, 2026
Retailer 3$9,265 AUD
Retailer 6$9,549 AUD
Retailer 13$10,102 AUD
Retailer 5$10,105 AUD
Retailer 9$10,317 AUD
Retailer 2$10,323 AUD
Retailer 8$10,506 AUD
Retailer 16$10,556 AUD
Retailer 7$10,949 AUD
Retailer 15$11,117 AUD
Retailer 14$11,183 AUD
Retailer 10$11,962 AUD
Retailer 4$12,634 AUD
Retailer 12$13,453 AUD
Retailer 11$15,260 AUD
NZ Jewellers$18,313 AUD

26 data points across 16 retailers

16 retailers$9,265 AUD to $15,260 AUD

A
Cheapest Retailer
-
$9,265 AUD
$6,493 USD
A
Retailer 2
-
$9,549 AUD
$6,692 USD
View
B+
Retailer 3
-
$10,102 AUD
$7,080 USD
View
B+
Retailer 4
-
$10,105 AUD
$7,082 USD
View
Final sale: no returns
B+
Retailer 5
-
$10,317 AUD
£5,693 GBP
View
B+
Retailer 6
-
$10,323 AUD
£5,697 GBP
View
Retailer 7
-
$10,506 AUD
$7,363 USD
View
Price last confirmed 18 days ago
Retailer 8
-
$10,556 AUD
View
Price last confirmed 12 days ago
Retailer 9
-
$10,949 AUD
$7,673 USD
View
Price last confirmed 11 days ago
Retailer 10
-
$11,117 AUD
$7,791 USD
View
Price last confirmed 11 days ago
B+
Retailer 11
-
$11,183 AUD
$7,837 USD
View
B+
Retailer 12
-
$11,962 AUD
€7,984 EUR
View
Retailer 13
-
$12,634 AUD
$8,854 USD
View
Price last confirmed 12 days ago
B+
Retailer 14
-
$13,453 AUD
ZAR 152,310 ZAR
View
B
Retailer 15
-
$15,260 AUD
£8,421 GBP
View
Most Expensive
NZ Jewellers
6fae2622-e45e-4ac6-8d72-ae0669f0c512 · Oct 21
$18,313 AUD
$12,834 USD
View
Price last confirmed 13 days ago
15 more retailers have this diamond
Prices start from $9,265 AUDSave up to $5,995 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
$9,265 AUD