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Oval|Natural|GIA

3.40ct J SI1 Oval Natural Diamond

ID • J/SI1 • GIA 1518607622

Certificate GIA 1518607622

Diamond specifications and retailer prices

From £21,971 GBP
$29,439 USD
As of October 31, 2026
Save £1,899 GBP (8%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £32,409 GBP at Cape Diamonds · As of October 22, 2026
View at Cape Diamonds

About this 3.4ct natural oval diamond

This 3.4ct natural oval sits in the three to five 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 1518607622. Listed at 5 retailers as of October 31, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

3.40
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
OriginNatural
Grading LabGIA
CertificateGIA 1518607622
Dimensions11.96 × 8.23 × 5.08 mm
L/W Ratio1.45
Girdle conditionFaceted
Culet sizeNone
Top View
11.96 mm8.23 mm3.40 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1518607622
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.8%

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 31
Current: £32,409 GBP|Low: £21,471 GBP|High: £32,622 GBP|Avg: £24,424 GBP|-0.1%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 31, 2026
Retailer 2£21,971 GBP
Retailer 4£23,647 GBP
Retailer 5£23,687 GBP
Retailer 3£23,870 GBP
Cape Diamonds£32,409 GBP

17 data points across 5 retailers

5 retailers£21,971 GBP to £23,870 GBP

B+
Cheapest Retailer
-
£21,971 GBP
$29,439 USD
B+
Retailer 2
-
£23,647 GBP
$31,684 USD
View
B
Retailer 3
-
£23,687 GBP
$31,738 USD
View
B
Retailer 4
-
£23,870 GBP
$31,983 USD
View
Most Expensive
Cape Diamonds
cert_1518607622 · Oct 22
£32,409 GBP
ZAR 701,531 ZAR
View
Price last confirmed 9 days ago
4 more retailers have this diamond
Prices start from £21,971 GBPSave up to £1,899 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+
3.40ct Oval
£21,971 GBP