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Radiant|Natural|GIA

1.51ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 1459117061

Certificate GIA 1459117061

Diamond specifications and retailer prices

From $3,790 AUD
HK$20,800 HKD
As of November 1, 2026
Save $4,454 AUD (54%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,232 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 J 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 1459117061. Listed at 21 retailers as of November 1, 2026, with a 118% 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1459117061
Dimensions9.18 × 5.19 × 3.55 mm
L/W Ratio1.77
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
9.18 mm5.19 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1459117061
Side View
Table 65.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 68.4%

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: $5,152 AUD|Low: $3,754 AUD|High: $8,957 AUD|Avg: $5,425 AUD|-6.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 9$3,790 AUD
Retailer 6$4,064 AUD
Retailer 12$4,497 AUD
Retailer 13$4,550 AUD
Retailer 4$4,735 AUD
Retailer 3$5,075 AUD
Retailer 11$5,136 AUD
Retailer 1$5,152 AUD
Retailer 2$5,239 AUD
Retailer 5$5,677 AUD
Retailer 10$5,773 AUD
Retailer 8$6,060 AUD
Retailer 7$8,244 AUD

33 data points across 13 retailers

21 retailers$3,790 AUD to $8,244 AUD

A
Cheapest Retailer
-
$3,790 AUD
HK$20,800 HKD
A
Retailer 2
-
$4,064 AUD
₹271,875 INR
View
A
Retailer 3
-
$4,497 AUD
$3,159 USD
View
A
Retailer 4
-
$4,550 AUD
$3,196 USD
View
Final sale: no returns
A
Retailer 5
-
$4,735 AUD
SGD 4,495 SGD
View
A
Retailer 6
-
$4,967 AUD
$3,489 USD
View
A
Retailer 7
-
$4,968 AUD
$3,490 USD
View
A
Retailer 8
-
$5,075 AUD
SGD 4,817 SGD
View
A
Retailer 9
-
$5,136 AUD
$3,608 USD
View
A
Retailer 10
-
$5,152 AUD
£2,850 GBP
View
A
Retailer 11
-
$5,239 AUD
$3,680 USD
View
B+
Retailer 12
-
$5,282 AUD
View
Retailer 13
-
$5,300 AUD
$3,723 USD
View
Price last confirmed 25 days ago
Retailer 14
-
$5,300 AUD
$3,723 USD
View
Price last confirmed 25 days ago
Retailer 15
-
$5,504 AUD
$3,866 USD
View
Price last confirmed 32 days ago
Retailer 16
-
$5,677 AUD
View
Price last confirmed 24 days ago
B+
Retailer 17
-
$5,773 AUD
€3,862 EUR
View
B+
Retailer 18
-
$6,060 AUD
ZAR 68,766 ZAR
View
Retailer 19
-
$6,114 AUD
$4,295 USD
View
Price last confirmed 23 days ago
B
Retailer 20
-
$8,244 AUD
£4,560 GBP
View
Most Expensive
NZ Jewellers
034ab330-a956-44c8-ade5-01dcb0f68dbe · Sep 30
$9,232 AUD
$6,485 USD
View
Price last confirmed 32 days ago
20 more retailers have this diamond
Prices start from $3,790 AUDSave up to $4,454 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
$3,790 AUD