Oval|Natural|GIA

1.51ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 1515314942

Certificate GIA 1515314942

Diamond specifications and retailer prices

From £3,483 GBP
₹444,419 INR
As of November 1, 2026
Save £3,293 GBP (49%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £7,693 GBP at NZ Jewellers · As of September 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1515314942. Listed at 21 retailers as of November 1, 2026, with a 95% 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle37.19°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1515314942
Dimensions9.00 × 6.43 × 4.04 mm
L/W Ratio1.40
Culet sizeNone
Top View
9.00 mm6.43 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1515314942
Side View
Table 60.0%Crown 37.19°Girdle: STK-THKPavilion 41°Culet: NoneDepth 62.7%

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: £7,693 GBP|Low: £3,483 GBP|High: £7,693 GBP|Avg: £5,069 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 4£3,483 GBP
Retailer 3£4,009 GBP
Retailer 9£4,245 GBP
Retailer 2£4,413 GBP
Retailer 10£4,571 GBP
Retailer 11£4,600 GBP
Retailer 7£5,026 GBP
Retailer 6£5,651 GBP
Retailer 8£6,664 GBP
Retailer 5£6,776 GBP
NZ Jewellers£7,693 GBP

33 data points across 11 retailers

21 retailers£3,483 GBP to £6,776 GBP

B+
Cheapest Retailer
-
£3,483 GBP
₹444,419 INR
B+
Retailer 2
-
£3,892 GBP
$5,215 USD
View
B
Retailer 3
-
£4,009 GBP
$5,372 USD
View
B
Retailer 4
-
£4,012 GBP
$5,375 USD
View
B
Retailer 5
-
£4,047 GBP
$5,423 USD
View
B+
Retailer 6
-
£4,245 GBP
$5,688 USD
View
Final sale: no returns
B+
Retailer 7
-
£4,284 GBP
$5,740 USD
View
B+
Retailer 8
-
£4,413 GBP
View
Retailer 9
-
£4,571 GBP
A$9,422 AUD
View
Price last confirmed 29 days ago
Retailer 10
-
£4,600 GBP
$6,163 USD
View
Price last confirmed 40 days ago
Retailer 11
-
£4,600 GBP
$6,163 USD
View
Price last confirmed 25 days ago
Retailer 12
-
£4,600 GBP
$6,163 USD
View
Price last confirmed 21 days ago
B
Retailer 13
-
£4,717 GBP
$6,320 USD
View
B
Retailer 14
-
£5,026 GBP
€6,414 EUR
View
B
Retailer 15
-
£5,141 GBP
$6,888 USD
View
Retailer 16
-
£5,307 GBP
$7,111 USD
View
Price last confirmed 41 days ago
Retailer 17
-
£5,307 GBP
$7,111 USD
View
Price last confirmed 23 days ago
B
Retailer 18
-
£5,651 GBP
ZAR 122,326 ZAR
View
B
Retailer 19
-
£6,664 GBP
$8,930 USD
View
B
Retailer 20
-
£6,776 GBP
View
Most Expensive
NZ Jewellers
27ef9794-3a8d-43b7-9091-dffc4b51fe26 · Sep 30
£7,693 GBP
$10,308 USD
View
Price last confirmed 32 days ago
20 more retailers have this diamond
Prices start from £3,483 GBPSave up to £3,293 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
£3,483 GBP