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Oval|Natural|GIA

1.51ct J SI2 Oval Natural Diamond

EX • J/SI2 • GIA 6422921460

Certificate GIA 6422921460

Diamond specifications and retailer prices

From £4,777 GBP
$6,400 USD
As of October 28, 2026
Save £4,113 GBP (46%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £10,669 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6422921460. Listed at 18 retailers as of October 28, 2026, with a 86% 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
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle45.52°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6422921460
Dimensions8.79 × 6.33 × 3.95 mm
L/W Ratio1.39
Top View
8.79 mm6.33 mm1.51 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 6422921460
Side View
Table 57.0%Crown 45.52°Girdle: THN-STKPavilion 37.98°Culet: NoneDepth 62.4%

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: Oct 28
Current: £10,669 GBP|Low: £4,445 GBP|High: £10,669 GBP|Avg: £6,483 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 6£4,777 GBP
Retailer 7£5,334 GBP
Retailer 11£5,335 GBP
Retailer 3£5,379 GBP
Retailer 10£5,779 GBP
Retailer 8£5,868 GBP
Retailer 5£6,011 GBP
Retailer 4£6,579 GBP
Retailer 9£6,668 GBP
Retailer 2£8,890 GBP
NZ Jewellers£10,669 GBP

41 data points across 11 retailers

18 retailers£4,777 GBP to £8,890 GBP

B+
Cheapest Retailer
-
£4,777 GBP
$6,400 USD
B
Retailer 2
-
£4,950 GBP
$6,632 USD
View
B
Retailer 3
-
£4,994 GBP
$6,692 USD
View
B
Retailer 4
-
£5,268 GBP
CA$9,804 CAD
View
B
Retailer 5
-
£5,334 GBP
$7,147 USD
View
Final sale: no returns
B
Retailer 6
-
£5,335 GBP
$7,148 USD
View
B
Retailer 7
-
£5,379 GBP
$7,207 USD
View
B
Retailer 8
-
£5,779 GBP
$7,743 USD
View
B
Retailer 9
-
£5,868 GBP
$7,862 USD
View
B
Retailer 10
-
£6,011 GBP
View
B
Retailer 11
-
£6,112 GBP
$8,189 USD
View
B
Retailer 12
-
£6,366 GBP
$8,530 USD
View
B
Retailer 13
-
£6,366 GBP
$8,530 USD
View
B
Retailer 14
-
£6,579 GBP
€8,395 EUR
View
B
Retailer 15
-
£6,583 GBP
$8,820 USD
View
B
Retailer 16
-
£6,668 GBP
$8,934 USD
View
B
Retailer 17
-
£8,890 GBP
View
Most Expensive
NZ Jewellers
4cfe04df-6bbe-485e-9145-1404a02f04fc · Oct 30
£10,669 GBP
$14,295 USD
View
Price under review
17 more retailers have this diamond
Prices start from £4,777 GBPSave up to £4,113 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
£4,777 GBP