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Oval|Natural|GIA

1.51ct H SI1 Oval Natural Diamond

GD • H/SI1 • GIA 2566587252

Certificate GIA 2566587252

Diamond specifications and retailer prices

From £4,136 GBP
HK$43,300 HKD
As of November 1, 2026
Save £5,271 GBP (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £9,407 GBP at NZ Jewellers · As of October 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2566587252. Listed at 20 retailers as of October 30, 2026, with prices from £4,136 to £9,407, a £5,271 spread on the same certified stone. NZ Jewellers lists it at £9,407. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.21°
Pavilion angle35.59°
OriginNatural
Grading LabGIA
CertificateGIA 2566587252
Dimensions8.83 × 6.26 × 3.98 mm
L/W Ratio1.41
Girdle conditionFaceted
Key to symbols
Cloud, Crystal, Needle
Top View
8.83 mm6.26 mm1.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566587252
Side View
Table 62.0%Crown 43.21°Girdle: STK-VTKPavilion 35.59°Culet: NoneDepth 63.6%

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 1
Current: £9,407 GBP|Low: £4,098 GBP|High: £9,407 GBP|Avg: £5,811 GBP
NZ Jewellers
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 2£4,136 GBP
Retailer 4£4,624 GBP
Retailer 11£4,715 GBP
Retailer 5£4,724 GBP
Retailer 8£4,906 GBP
Retailer 7£4,936 GBP
Retailer 12£5,094 GBP
Retailer 10£5,191 GBP
Retailer 16£5,192 GBP
Retailer 15£5,316 GBP
Retailer 3£5,423 GBP
Retailer 17£5,711 GBP
Retailer 9£5,736 GBP
Retailer 13£6,146 GBP
Retailer 14£6,490 GBP
Retailer 18£6,849 GBP
Retailer 19£7,849 GBP
Retailer 6£8,031 GBP
NZ Jewellers£9,407 GBP

18 data points across 19 retailers

20 retailers£4,136 GBP to £9,407 GBP

B+
Cheapest Retailer
-
£4,136 GBP
HK$43,300 HKD
B+
Retailer 2
-
£4,624 GBP
$6,195 USD
View
Retailer 3
-
£4,715 GBP
SGD 8,537 SGD
View
Price last confirmed 18 days ago
Retailer 4
-
£4,724 GBP
$6,330 USD
View
Price last confirmed 14 days ago
B
Retailer 5
-
£4,851 GBP
SGD 8,783 SGD
View
B
Retailer 6
-
£4,906 GBP
$6,573 USD
View
B
Retailer 7
-
£4,936 GBP
$6,614 USD
View
B
Retailer 8
-
£5,094 GBP
View
B
Retailer 9
-
£5,191 GBP
$6,956 USD
View
Final sale: no returns
B
Retailer 10
-
£5,192 GBP
$6,957 USD
View
B
Retailer 11
-
£5,316 GBP
View
Retailer 12
-
£5,423 GBP
A$11,179 AUD
View
Price last confirmed 11 days ago
B
Retailer 13
-
£5,711 GBP
$7,652 USD
View
B
Retailer 14
-
£5,736 GBP
$7,686 USD
View
B
Retailer 15
-
£6,146 GBP
€7,843 EUR
View
B
Retailer 16
-
£6,490 GBP
$8,696 USD
View
B
Retailer 17
-
£6,849 GBP
ZAR 148,263 ZAR
View
B
Retailer 18
-
£7,849 GBP
View
C
Retailer 19
-
£8,031 GBP
$10,761 USD
View
Most Expensive
C
NZ Jewellers
d5bcc41e-c031-44c4-9f9f-ee524f4ff7bc · Oct 30
£9,407 GBP
$12,605 USD
View
19 more retailers have this diamond
Prices start from £4,136 GBPSave up to £5,271 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
£4,136 GBP