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Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

VG • I/SI1 • GIA 2427873957

Certificate GIA 2427873957

Diamond specifications and retailer prices

From £4,222 GBP
HK$44,200 HKD
As of November 1, 2026
Save £5,377 GBP (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £9,599 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2427873957. Listed at 19 retailers as of October 30, 2026, with prices from £4,222 to £9,599, a £5,377 spread on the same certified stone. NZ Jewellers lists it at £9,599. 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
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2427873957
Dimensions8.59 × 6.30 × 4.02 mm
L/W Ratio1.36
Top View
8.59 mm6.30 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2427873957
Side View
Table 56.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.7%

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: £6,269 GBP|Low: £4,023 GBP|High: £8,095 GBP|Avg: £5,714 GBP|+2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 8£4,222 GBP
Retailer 11£4,489 GBP
Retailer 2£4,799 GBP
Retailer 12£4,840 GBP
Retailer 4£5,200 GBP
Retailer 3£5,280 GBP
Retailer 5£5,411 GBP
Retailer 10£5,533 GBP
Retailer 1£6,269 GBP
Retailer 9£6,324 GBP
Retailer 7£7,051 GBP
Retailer 6£7,999 GBP

43 data points across 12 retailers

19 retailers£4,222 GBP to £9,599 GBP

B+
Cheapest Retailer
-
£4,222 GBP
HK$44,200 HKD
B+
Retailer 2
-
£4,489 GBP
$6,015 USD
View
B+
Retailer 3
-
£4,799 GBP
$6,430 USD
View
Final sale: no returns
B+
Retailer 4
-
£4,800 GBP
$6,431 USD
View
B+
Retailer 5
-
£4,839 GBP
$6,484 USD
View
B+
Retailer 6
-
£4,840 GBP
$6,485 USD
View
B
Retailer 7
-
£5,200 GBP
$6,967 USD
View
B
Retailer 8
-
£5,280 GBP
$7,074 USD
View
B
Retailer 9
-
£5,411 GBP
View
Retailer 10
-
£5,533 GBP
A$11,406 AUD
View
Price last confirmed 11 days ago
B
Retailer 11
-
£5,692 GBP
$7,626 USD
View
B
Retailer 12
-
£5,762 GBP
$7,720 USD
View
B
Retailer 13
-
£5,762 GBP
$7,720 USD
View
B
Retailer 14
-
£5,956 GBP
$7,980 USD
View
B
Retailer 15
-
£5,999 GBP
$8,038 USD
View
B
Retailer 16
-
£6,269 GBP
€8,000 EUR
View
B
Retailer 17
-
£7,051 GBP
ZAR 152,636 ZAR
View
B
Retailer 18
-
£7,999 GBP
View
Most Expensive
C
NZ Jewellers
291f68da-725f-4ac0-8c62-3671c641db6a · Oct 30
£9,599 GBP
$12,862 USD
View
18 more retailers have this diamond
Prices start from £4,222 GBPSave up to £5,377 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
£4,222 GBP