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Radiant|Natural|GIA

1.51ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2245001864

Certificate GIA 2245001864

Diamond specifications and retailer prices

From $8,364 AUD
$5,876 USD
As of October 28, 2026
Save $7,586 AUD (48%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $20,158 AUD at NZ Jewellers · As of September 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 E 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 2245001864. Listed at 23 retailers as of October 28, 2026, with a 91% 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2245001864
Dimensions7.57 × 5.59 × 3.79 mm
L/W Ratio1.35
Girdle conditionPolished
Top View
7.57 mm5.59 mm1.51 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245001864
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.8%

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: Oct 28
Current: $9,429 AUD|Low: $8,364 AUD|High: $16,568 AUD|Avg: $10,528 AUD|-1.7%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 30, 2026
Retailer 17$8,364 AUD
Retailer 8$8,381 AUD
Retailer 4$8,923 AUD
Retailer 3$9,056 AUD
Retailer 14$9,271 AUD
Retailer 6$9,336 AUD
Retailer 18$9,427 AUD
Retailer 1$9,429 AUD
Retailer 10$9,517 AUD
Retailer 7$9,537 AUD
Retailer 9$9,836 AUD
Retailer 5$9,903 AUD
Retailer 12$10,246 AUD
Retailer 13$10,915 AUD
Retailer 11$10,964 AUD
Retailer 2$12,113 AUD
Retailer 16$12,418 AUD
Retailer 19$13,860 AUD
Retailer 15$15,949 AUD

22 data points across 19 retailers

23 retailers$8,364 AUD to $15,949 AUD

A
Cheapest Retailer
-
$8,364 AUD
$5,876 USD
A
Retailer 2
-
$8,381 AUD
HK$46,000 HKD
View
A
Retailer 3
-
$8,923 AUD
$6,269 USD
View
A
Retailer 4
-
$9,056 AUD
$6,362 USD
View
A
Retailer 5
-
$9,271 AUD
$6,513 USD
View
A
Retailer 6
-
$9,336 AUD
View
A
Retailer 7
-
$9,427 AUD
$6,623 USD
View
A
Retailer 8
-
$9,429 AUD
€6,309 EUR
View
A
Retailer 9
-
$9,517 AUD
$6,686 USD
View
Final sale: no returns
A
Retailer 10
-
$9,537 AUD
$6,700 USD
View
Retailer 11
-
$9,615 AUD
SGD 9,128 SGD
View
Price last confirmed 22 days ago
A
Retailer 12
-
$9,836 AUD
$6,910 USD
View
A
Retailer 13
-
$9,903 AUD
$6,958 USD
View
A
Retailer 14
-
$10,246 AUD
£5,668 GBP
View
Retailer 15
-
$10,761 AUD
$7,560 USD
View
Price last confirmed 21 days ago
A
Retailer 16
-
$10,915 AUD
$7,668 USD
View
Retailer 17
-
$10,964 AUD
View
Price last confirmed 8 days ago
B+
Retailer 18
-
$11,128 AUD
View
B+
Retailer 19
-
$12,113 AUD
$8,510 USD
View
B+
Retailer 20
-
$12,418 AUD
€8,309 EUR
View
B+
Retailer 21
-
$13,860 AUD
ZAR 157,302 ZAR
View
B+
Retailer 22
-
$15,949 AUD
£8,823 GBP
View
Most Expensive
NZ Jewellers
d72e9f87-f2b0-40af-9c57-de40d7e9850d · Sep 21
$20,158 AUD
$14,162 USD
View
Price last confirmed 39 days ago
22 more retailers have this diamond
Prices start from $8,364 AUDSave up to $7,586 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
$8,364 AUD