Oval|Natural|GIA

1.51ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 2556769921

Certificate GIA 2556769921

Diamond specifications and retailer prices

From £2,527 GBP
$3,386 USD
As of October 31, 2026
Save £687 GBP (21%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £5,592 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 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 2556769921. Listed at 24 retailers as of October 31, 2026, with a 27% 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
FluorescenceStrong
Crown angle40.31°
Pavilion angle38.84°
OriginNatural
Grading LabGIA
CertificateGIA 2556769921
Dimensions8.94 × 6.39 × 3.96 mm
L/W Ratio1.40
Culet sizeNone
Top View
8.94 mm6.39 mm1.51 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 2556769921
Side View
Table 59.0%Crown 40.31°Girdle: STK-THKPavilion 38.84°Culet: NoneDepth 62.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £5,592 GBP|Low: £2,233 GBP|High: £5,592 GBP|Avg: £3,074 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
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Retailer 18
Retailer 19
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Retailer 24
Retailer 25
Retailer 26
Retailer 27
Retailer 28
Retailer 29
Retailer 30
Retailer 31
October 21, 2026
Retailer 18£2,233 GBP
Retailer 26£2,452 GBP
Retailer 3£2,468 GBP
Retailer 2£2,527 GBP
Retailer 27£2,529 GBP
Retailer 10£2,558 GBP
Retailer 19£2,656 GBP
Retailer 14£2,684 GBP
Retailer 8£2,780 GBP
Retailer 20£2,846 GBP
Retailer 23£2,866 GBP
Retailer 15£2,882 GBP
Retailer 11£2,905 GBP
Retailer 29£2,908 GBP
Retailer 5£3,020 GBP
Retailer 4£3,021 GBP
Retailer 13£3,102 GBP
Retailer 21£3,122 GBP
Retailer 16£3,146 GBP
Retailer 7£3,164 GBP
Retailer 17£3,214 GBP
Retailer 24£3,258 GBP
Retailer 9£3,355 GBP
Retailer 12£3,390 GBP
Retailer 28£3,401 GBP
Retailer 25£3,794 GBP
Retailer 31£3,896 GBP
Retailer 22£4,280 GBP
Retailer 6£4,641 GBP
Retailer 30£5,140 GBP
NZ Jewellers£5,592 GBP

18 data points across 31 retailers

24 retailers£2,527 GBP to £3,214 GBP

Retailer 1
-
£2,452 GBP
$3,285 USD
Price last confirmed 14 days ago
Retailer 2
-
£2,468 GBP
$3,307 USD
View
Price last confirmed 15 days ago
A
Retailer 3
-
£2,527 GBP
$3,386 USD
View
Retailer 4
-
£2,529 GBP
$3,389 USD
View
Price last confirmed 12 days ago
Retailer 5
-
£2,558 GBP
$3,428 USD
View
Price last confirmed 12 days ago
Retailer 6
-
£2,688 GBP
$3,601 USD
View
Price last confirmed 13 days ago
Retailer 7
-
£2,780 GBP
$3,725 USD
View
Price last confirmed 13 days ago
Retailer 8
-
£2,866 GBP
$3,840 USD
View
Price last confirmed 34 days ago
B+
Retailer 9
-
£2,882 GBP
$3,861 USD
View
B+
Retailer 10
-
£2,902 GBP
$3,889 USD
View
B+
Retailer 11
-
£2,905 GBP
CA$5,405 CAD
View
Retailer 12
-
£2,908 GBP
$3,896 USD
View
Price last confirmed 14 days ago
Retailer 13
-
£3,020 GBP
$4,046 USD
View
Price last confirmed 16 days ago
Retailer 14
-
£3,102 GBP
View
Price last confirmed 13 days ago
Retailer 15
-
£3,164 GBP
$4,240 USD
View
Price last confirmed 13 days ago
B+
Retailer 16
-
£3,214 GBP
$4,307 USD
View
Retailer 17
-
£3,258 GBP
View
Price last confirmed 13 days ago
Retailer 18
-
£3,355 GBP
$4,496 USD
View
Price last confirmed 13 days ago
Retailer 19
-
£3,390 GBP
$4,543 USD
View
Price last confirmed 14 days ago
Retailer 20
-
£3,896 GBP
ZAR 84,343 ZAR
View
Price last confirmed 15 days ago
Retailer 21
-
£4,280 GBP
$5,735 USD
View
Price last confirmed 37 days ago
Retailer 22
-
£4,641 GBP
$6,219 USD
View
Price last confirmed 16 days ago
Retailer 23
-
£5,140 GBP
View
Price last confirmed 13 days ago
Most Expensive
NZ Jewellers
e5deafd4-215d-47a4-bd32-c676083a86f0 · Oct 17
£5,592 GBP
$7,493 USD
View
Price last confirmed 15 days ago
23 more retailers have this diamond
Prices start from £2,527 GBPSave up to £687 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
£2,527 GBP