Oval|Natural|GIA

1.51ct E SI1 Oval Natural Diamond

ID • E/SI1 • GIA 6531137674

Certificate GIA 6531137674

Diamond specifications and retailer prices

From £6,208 GBP
$8,267 USD
As of October 26, 2026
Save £4,161 GBP (40%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £11,051 GBP at NZ Jewellers · As of September 28, 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 E 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 6531137674. Listed at 18 retailers as of October 26, 2026, with a 67% 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
E
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle37.3°
OriginNatural
Grading LabGIA
CertificateGIA 6531137674
Dimensions8.77 × 6.46 × 4.11 mm
L/W Ratio1.36
Top View
8.77 mm6.46 mm1.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531137674
Side View
Table 57.0%Crown 38.6°Girdle: STK-THKPavilion 37.3°Culet: NoneDepth 63.6%

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: Oct 26
Current: £7,229 GBP|Low: £5,880 GBP|High: £10,481 GBP|Avg: £7,359 GBP|-0.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 10£5,880 GBP
Retailer 5£6,122 GBP
Retailer 14£6,208 GBP
Retailer 13£6,582 GBP
Retailer 11£6,631 GBP
Retailer 6£6,686 GBP
Retailer 12£7,183 GBP
Retailer 1£7,229 GBP
Retailer 8£7,286 GBP
Retailer 2£7,787 GBP
Retailer 3£7,787 GBP
Retailer 4£8,050 GBP
Retailer 9£9,569 GBP
Retailer 7£10,369 GBP

41 data points across 14 retailers

18 retailers£6,208 GBP to £10,369 GBP

A
Retailer 1
-
£5,880 GBP
$7,830 USD
Price last confirmed 8 days ago
B+
Retailer 2
-
£6,208 GBP
$8,267 USD
View
B+
Retailer 3
-
£6,582 GBP
$8,765 USD
View
B+
Retailer 4
-
£6,631 GBP
$8,830 USD
View
B+
Retailer 5
-
£6,686 GBP
$8,904 USD
View
B+
Retailer 6
-
£7,069 GBP
$9,414 USD
View
B+
Retailer 7
-
£7,183 GBP
$9,566 USD
View
Price last confirmed 30 days ago
B+
Retailer 8
-
£7,183 GBP
$9,566 USD
View
B+
Retailer 9
-
£7,229 GBP
View
B+
Retailer 10
-
£7,286 GBP
A$14,926 AUD
View
B+
Retailer 11
-
£7,717 GBP
$10,277 USD
View
B+
Retailer 12
-
£7,787 GBP
$10,370 USD
View
B+
Retailer 13
-
£7,787 GBP
$10,370 USD
View
B+
Retailer 14
-
£8,050 GBP
$10,720 USD
View
B+
Retailer 15
-
£8,289 GBP
$11,038 USD
View
Price last confirmed 30 days ago
B
Retailer 16
-
£9,569 GBP
ZAR 205,864 ZAR
View
Price last confirmed 7 days ago
B
Retailer 17
-
£10,369 GBP
View
Most Expensive
B
NZ Jewellers
00c0aeb9-6e00-439a-b006-4463ad937dc4 · Sep 28
£11,051 GBP
$14,717 USD
View
Price last confirmed 31 days ago
17 more retailers have this diamond
Prices start from £6,208 GBPSave up to £4,161 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
£6,208 GBP