Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 6525635517

Certificate GIA 6525635517

Diamond specifications and retailer prices

From $11,670 NZD
HK$51,300 HKD
As of November 1, 2026
Save $10,233 NZD (47%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $26,286 NZD 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: $14,704 NZD|Low: $11,670 NZD|High: $22,168 NZD|Avg: $15,807 NZD|-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$11,670 NZD
Retailer 2$13,420 NZD
Retailer 3$13,584 NZD
Retailer 11$14,432 NZD
Retailer 10$14,506 NZD
Retailer 5$14,529 NZD
Retailer 1$14,704 NZD
Retailer 9$14,887 NZD
Retailer 4$17,171 NZD
Retailer 7$19,308 NZD
Retailer 6$21,904 NZD

36 data points across 11 retailers

19 retailers$11,670 NZD to $21,904 NZD

A
Cheapest Retailer
-
$11,670 NZD
HK$51,300 HKD
Retailer 2
-
$13,311 NZD
SGD 10,121 SGD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
$13,420 NZD
$7,551 USD
View
B+
Retailer 4
-
$13,584 NZD
$7,643 USD
View
B+
Retailer 5
-
$14,334 NZD
A$12,408 AUD
View
B+
Retailer 6
-
$14,432 NZD
$8,120 USD
View
B
Retailer 7
-
$14,506 NZD
$8,162 USD
View
Final sale: no returns
Retailer 8
-
$14,508 NZD
$8,163 USD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
$14,529 NZD
£6,437 GBP
View
B+
Retailer 10
-
$14,704 NZD
£6,514 GBP
View
Retailer 11
-
$14,887 NZD
A$12,887 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
$15,717 NZD
$8,843 USD
View
Price last confirmed 26 days ago
B+
Retailer 13
-
$15,739 NZD
$8,856 USD
View
Retailer 14
-
$15,958 NZD
$8,979 USD
View
Price last confirmed 34 days ago
B+
Retailer 15
-
$17,171 NZD
€9,201 EUR
View
Retailer 16
-
$18,134 NZD
$10,203 USD
View
Price last confirmed 24 days ago
B
Retailer 17
-
$19,308 NZD
ZAR 175,505 ZAR
View
B
Retailer 18
-
$21,904 NZD
£9,704 GBP
View
Most Expensive
NZ Jewellers
e9163b27-0ca1-4f3a-9cca-51d1a823de61 · Sep 30
$26,286 NZD
$14,790 USD
View
Price last confirmed 33 days ago
18 more retailers have this diamond
Prices start from $11,670 NZDSave up to $10,233 NZD

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
$11,670 NZD