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Oval|Natural|GIA

1.51ct F SI1 Oval Natural Diamond

EX • F/SI1 • GIA 1545696258

Certificate GIA 1545696258

Diamond specifications and retailer prices

From £4,343 GBP
₹555,060 INR
As of November 2, 2026
Save £1,186 GBP (21%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,529 GBP at Blue Nile · As of October 29, 2026
View at Blue Nile

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 1545696258. Listed at 8 retailers as of October 29, 2026, with prices from £4,343 to £5,529, a £1,186 spread on the same certified stone. Blue Nile lists it at £5,529. 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
OriginNatural
Grading LabGIA
CertificateGIA 1545696258
Dimensions8.55 × 6.50 × 4.22 mm
L/W Ratio1.32
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle, Natural
Top View
8.55 mm6.50 mm1.51 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545696258
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 64.8%

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: Nov 2
Current: £5,529 GBP|Low: £4,260 GBP|High: £5,801 GBP|Avg: £4,926 GBP|-4.7%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 2£4,343 GBP
Retailer 4£4,543 GBP
Retailer 5£4,736 GBP
Retailer 6£4,888 GBP
Retailer 3£4,957 GBP
Retailer 7£4,989 GBP
Blue Nile£5,529 GBP

46 data points across 7 retailers

8 retailers£4,343 GBP to £5,529 GBP

A
Cheapest Retailer
-
£4,343 GBP
₹555,060 INR
A
Retailer 2
-
£4,543 GBP
SGD 8,239 SGD
View
A
Retailer 3
-
£4,736 GBP
$6,356 USD
View
B+
Retailer 4
-
£4,888 GBP
$6,560 USD
View
Final sale: no returns
A
Retailer 5
-
£4,957 GBP
View
B+
Retailer 6
-
£4,989 GBP
MYR 27,268 MYR
View
B+
Retailer 7
-
£5,477 GBP
A$11,308 AUD
View
Most Expensive
B+
Blue Nile
28840668 · Oct 29
£5,529 GBP
$7,419 USD
View
7 more retailers have this diamond
Prices start from £4,343 GBPSave up to £1,186 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.

A
1.51ct Oval
£4,343 GBP