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Oval|Natural|GIA

1.23ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 5536897286

Certificate GIA 5536897286

Diamond specifications and retailer prices

From £1,377 GBP
As of November 2, 2026
Save £2,538 GBP (65%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,915 GBP at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 1.23ct natural oval diamond

This 1.23ct natural oval sits in the classic one-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 5536897286. Listed at 18 retailers as of November 2, 2026, with prices from £1,377 to £3,915, a £2,538 spread on the same certified stone. NZ Jewellers lists it at £3,915. 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

1.23
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Pavilion angle39.9°
OriginNatural
Grading LabGIA
CertificateGIA 5536897286
Dimensions8.23 × 5.95 × 3.85 mm
L/W Ratio1.38
Top View
8.23 mm5.95 mm1.23 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5536897286
Side View
Table 58.0%CrownGirdle: STK-VTKPavilion 39.9°Culet: NoneDepth 64.8%

Caratlytics Score

How it works →
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: Nov 2
Current: £3,915 GBP|Low: £1,357 GBP|High: £3,915 GBP|Avg: £1,950 GBP|+0.5%
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
November 3, 2026
Retailer 15£1,377 GBP
Retailer 7£1,458 GBP
Retailer 2£1,510 GBP
Retailer 4£1,565 GBP
Retailer 9£1,607 GBP
Retailer 8£1,608 GBP
Retailer 11£1,700 GBP
Retailer 3£1,736 GBP
Retailer 5£1,771 GBP
Retailer 12£1,786 GBP
Retailer 16£1,826 GBP
Retailer 14£1,924 GBP
Retailer 6£2,289 GBP
Retailer 17£2,338 GBP
Retailer 10£2,784 GBP
Retailer 13£3,281 GBP
NZ Jewellers£3,915 GBP

24 data points across 17 retailers

18 retailers£1,377 GBP to £3,915 GBP

A
Cheapest Retailer
-
£1,377 GBP
A
Retailer 2
-
£1,458 GBP
View
A
Retailer 3
-
£1,510 GBP
View
B+
Retailer 4
-
£1,565 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,607 GBP
View
B+
Retailer 6
-
£1,608 GBP
View
B+
Retailer 7
-
£1,700 GBP
View
B+
Retailer 8
-
£1,736 GBP
View
B+
Retailer 9
-
£1,771 GBP
View
B+
Retailer 10
-
£1,786 GBP
View
B+
Retailer 11
-
£1,826 GBP
View
B+
Retailer 12
-
£1,924 GBP
View
Retailer 13
-
£2,109 GBP
View
Price last confirmed 30 days ago
B
Retailer 14
-
£2,289 GBP
View
B
Retailer 15
-
£2,338 GBP
View
B
Retailer 16
-
£2,784 GBP
View
B
Retailer 17
-
£3,281 GBP
View
Most Expensive
B
NZ Jewellers
2f0773d7-3dae-4c80-acf8-fb50dee7c93d · Nov 2
£3,915 GBP
$5,240 USD
View
17 more retailers have this diamond
Prices start from £1,377 GBPSave up to £2,538 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
1.23ct Oval
£1,377 GBP