Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 6525635517

Certificate GIA 6525635517

Diamond specifications and retailer prices

From $9,370 AUD
HK$51,300 HKD
As of November 1, 2026
Save $8,216 AUD (47%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $21,104 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.51ct natural oval diamond

This 1.51ct natural oval sits in the one-and-a-half to two carat band, graded F 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 6525635517. Listed at 19 retailers as of November 1, 2026, with a 88% 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6525635517
Dimensions8.89 × 6.30 × 4.04 mm
L/W Ratio1.41
Top View
8.89 mm6.30 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6525635517
Side View
Table 62.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 64.1%

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: $11,805 AUD|Low: $9,370 AUD|High: $17,797 AUD|Avg: $12,691 AUD|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 8$9,370 AUD
Retailer 2$10,775 AUD
Retailer 3$10,906 AUD
Retailer 11$11,586 AUD
Retailer 10$11,646 AUD
Retailer 5$11,665 AUD
Retailer 1$11,805 AUD
Retailer 9$11,952 AUD
Retailer 4$13,785 AUD
Retailer 7$15,501 AUD
Retailer 6$17,585 AUD

36 data points across 11 retailers

19 retailers$9,370 AUD to $17,585 AUD

A
Cheapest Retailer
-
$9,370 AUD
HK$51,300 HKD
Retailer 2
-
$10,687 AUD
SGD 10,121 SGD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
$10,775 AUD
$7,551 USD
View
B+
Retailer 4
-
$10,906 AUD
$7,643 USD
View
B+
Retailer 5
-
$11,508 AUD
View
B+
Retailer 6
-
$11,586 AUD
$8,120 USD
View
B
Retailer 7
-
$11,646 AUD
$8,162 USD
View
Final sale: no returns
Retailer 8
-
$11,648 AUD
$8,163 USD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
$11,665 AUD
£6,437 GBP
View
B+
Retailer 10
-
$11,805 AUD
£6,514 GBP
View
Retailer 11
-
$11,952 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
$12,618 AUD
$8,843 USD
View
Price last confirmed 25 days ago
B+
Retailer 13
-
$12,636 AUD
$8,856 USD
View
Retailer 14
-
$12,812 AUD
$8,979 USD
View
Price last confirmed 33 days ago
B+
Retailer 15
-
$13,785 AUD
€9,201 EUR
View
Retailer 16
-
$14,559 AUD
$10,203 USD
View
Price last confirmed 24 days ago
B
Retailer 17
-
$15,501 AUD
ZAR 175,505 ZAR
View
B
Retailer 18
-
$17,585 AUD
£9,704 GBP
View
Most Expensive
NZ Jewellers
e9163b27-0ca1-4f3a-9cca-51d1a823de61 · Sep 30
$21,104 AUD
$14,790 USD
View
Price last confirmed 33 days ago
18 more retailers have this diamond
Prices start from $9,370 AUDSave up to $8,216 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 Oval
$9,370 AUD