Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 7516255976

Certificate GIA 7516255976

Diamond specifications and retailer prices

From £5,546 GBP
$7,442 USD
As of November 2, 2026
Save £3,507 GBP (39%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £10,863 GBP 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 7516255976. Listed at 16 retailers as of November 2, 2026, with a 63% 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
FluorescenceNone
Crown angle36.55°
Pavilion angle39.32°
OriginNatural
Grading LabGIA
CertificateGIA 7516255976
Dimensions8.87 × 6.32 × 4.07 mm
L/W Ratio1.40
Culet sizeNone
Key to symbols
Feather, Crystal, Needle, Indented Natural, Natural
Top View
8.87 mm6.32 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7516255976
Side View
Table 57.0%Crown 36.55°Girdle: STK-VTKPavilion 39.32°Culet: NoneDepth 64.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £5,994 GBP|Low: £5,496 GBP|High: £9,161 GBP|Avg: £6,474 GBP|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 3, 2026
Retailer 9£5,546 GBP
Retailer 2£5,614 GBP
Retailer 10£5,969 GBP
Retailer 1£5,994 GBP
Retailer 8£5,995 GBP
Retailer 3£6,077 GBP
Retailer 7£6,151 GBP
Retailer 4£7,095 GBP
Retailer 6£7,980 GBP
Retailer 5£9,052 GBP

36 data points across 10 retailers

16 retailers£5,546 GBP to £9,052 GBP

B+
Cheapest Retailer
-
£5,546 GBP
$7,442 USD
B+
Retailer 2
-
£5,614 GBP
$7,534 USD
View
B+
Retailer 3
-
£5,969 GBP
$8,010 USD
View
B+
Retailer 4
-
£5,994 GBP
View
B+
Retailer 5
-
£5,995 GBP
$8,045 USD
View
Final sale: no returns
Retailer 6
-
£5,996 GBP
$8,046 USD
View
Price last confirmed 26 days ago
B+
Retailer 7
-
£6,077 GBP
View
Retailer 8
-
£6,151 GBP
A$12,698 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
£6,495 GBP
$8,716 USD
View
Price last confirmed 26 days ago
B
Retailer 10
-
£6,515 GBP
$8,742 USD
View
Retailer 11
-
£6,595 GBP
$8,850 USD
View
Price last confirmed 34 days ago
B
Retailer 12
-
£7,095 GBP
€9,068 EUR
View
Retailer 13
-
£7,494 GBP
$10,057 USD
View
Price last confirmed 24 days ago
B
Retailer 14
-
£7,980 GBP
ZAR 172,991 ZAR
View
B
Retailer 15
-
£9,052 GBP
View
Most Expensive
NZ Jewellers
7d235d39-6a53-4af6-a403-d2c7af3c6082 · Sep 30
£10,863 GBP
$14,578 USD
View
Price last confirmed 33 days ago
15 more retailers have this diamond
Prices start from £5,546 GBPSave up to £3,507 GBP

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.

B+
1.51ct Oval
£5,546 GBP