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Oval|Natural|GIA

1.51ct E SI2 Oval Natural Diamond

EX • E/SI2 • GIA 6555675807

Certificate GIA 6555675807

Diamond specifications and retailer prices

From £2,711 GBP
HK$28,200 HKD
As of October 24, 2026
Save £1,418 GBP (34%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £6,500 GBP at NZ Jewellers · As of October 17, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555675807. Listed at 9 retailers as of October 24, 2026, with a 52% 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Pavilion angle37.08°
OriginNatural
Grading LabGIA
CertificateGIA 6555675807
Dimensions8.84 × 6.34 × 4.12 mm
L/W Ratio1.39
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
8.84 mm6.34 mm1.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6555675807
Side View
Table 57.0%CrownGirdle: MED-THKPavilion 37.08°Culet: NoneDepth 64.9%

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 24
Current: £6,500 GBP|Low: £2,711 GBP|High: £6,788 GBP|Avg: £4,294 GBP|-4.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 21, 2026
Retailer 7£2,711 GBP
Retailer 2£3,288 GBP
Retailer 9£3,482 GBP
Retailer 3£3,532 GBP
Retailer 6£3,731 GBP
Retailer 8£3,731 GBP
Retailer 10£4,128 GBP
Retailer 4£4,261 GBP
Retailer 5£5,974 GBP
NZ Jewellers£6,500 GBP

33 data points across 10 retailers

9 retailers£2,711 GBP to £4,128 GBP

A
Cheapest Retailer
-
£2,711 GBP
HK$28,200 HKD
A
Retailer 2
-
£3,288 GBP
$4,378 USD
View
A
Retailer 3
-
£3,482 GBP
SGD 6,266 SGD
View
Price last confirmed 12 days ago
A
Retailer 4
-
£3,532 GBP
View
Price last confirmed 10 days ago
A
Retailer 5
-
£3,731 GBP
$4,969 USD
View
Price last confirmed 11 days ago
A
Retailer 6
-
£3,731 GBP
$4,969 USD
View
Price last confirmed 13 days ago
A
Retailer 7
-
£4,128 GBP
A$8,458 AUD
View
B+
Retailer 8
-
£5,974 GBP
View
Price last confirmed 10 days ago
Most Expensive
B+
NZ Jewellers
0adffb2b-0a48-4c46-8185-57525483dd4f · Oct 17
£6,500 GBP
$8,656 USD
View
Price last confirmed 12 days ago
8 more retailers have this diamond
Prices start from £2,711 GBPSave up to £1,418 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
£2,711 GBP