Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 6525635517

Certificate GIA 6525635517

Diamond specifications and retailer prices

From $8,398 SGD
HK$51,300 HKD
As of November 1, 2026
Save $7,363 SGD (47%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $18,915 SGD 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $10,581 SGD|Low: $8,398 SGD|High: $15,951 SGD|Avg: $11,374 SGD|-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$8,398 SGD
Retailer 2$9,657 SGD
Retailer 3$9,775 SGD
Retailer 11$10,385 SGD
Retailer 10$10,438 SGD
Retailer 5$10,455 SGD
Retailer 1$10,581 SGD
Retailer 9$10,713 SGD
Retailer 4$12,356 SGD
Retailer 7$13,894 SGD
Retailer 6$15,761 SGD

36 data points across 11 retailers

19 retailers$8,398 SGD to $15,761 SGD

A
Cheapest Retailer
-
$8,398 SGD
HK$51,300 HKD
Retailer 2
-
$9,578 SGD
View
Price last confirmed 21 days ago
B+
Retailer 3
-
$9,657 SGD
$7,551 USD
View
B+
Retailer 4
-
$9,775 SGD
$7,643 USD
View
B+
Retailer 5
-
$10,315 SGD
A$12,408 AUD
View
B+
Retailer 6
-
$10,385 SGD
$8,120 USD
View
B
Retailer 7
-
$10,438 SGD
$8,162 USD
View
Final sale: no returns
Retailer 8
-
$10,440 SGD
$8,163 USD
View
Price last confirmed 21 days ago
B+
Retailer 9
-
$10,455 SGD
£6,437 GBP
View
B+
Retailer 10
-
$10,581 SGD
£6,514 GBP
View
Retailer 11
-
$10,713 SGD
A$12,887 AUD
View
Price last confirmed 11 days ago
Retailer 12
-
$11,309 SGD
$8,843 USD
View
Price last confirmed 26 days ago
B+
Retailer 13
-
$11,326 SGD
$8,856 USD
View
Retailer 14
-
$11,483 SGD
$8,979 USD
View
Price last confirmed 34 days ago
B+
Retailer 15
-
$12,356 SGD
€9,201 EUR
View
Retailer 16
-
$13,049 SGD
$10,203 USD
View
Price last confirmed 24 days ago
B
Retailer 17
-
$13,894 SGD
ZAR 175,505 ZAR
View
B
Retailer 18
-
$15,761 SGD
£9,704 GBP
View
Most Expensive
NZ Jewellers
e9163b27-0ca1-4f3a-9cca-51d1a823de61 · Sep 30
$18,915 SGD
$14,790 USD
View
Price last confirmed 33 days ago
18 more retailers have this diamond
Prices start from $8,398 SGDSave up to $7,363 SGD

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
$8,398 SGD