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Oval|Natural|GIA

0.40ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 1533873137

Certificate GIA 1533873137

Diamond specifications and retailer prices

From £327 GBP
$438 USD
As of October 31, 2026
Save £61 GBP (16%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £388 GBP at Jared · As of October 30, 2026
View at Jared

About this 0.4ct natural oval diamond

This 0.4ct natural oval sits in the sub-half-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 1533873137. Listed at 2 retailers as of October 30, 2026, with prices from £327 to £388, a £61 spread on the same certified stone. Jared lists it at £388. 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

0.40
Carat
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1533873137
Dimensions5.81 × 4.14 × 2.55 mm
L/W Ratio1.40
Girdle conditionFaceted
Top View
5.81 mm4.14 mm0.40 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1533873137
Side View
Table 62.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 61.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £388 GBP|Low: £327 GBP|High: £413 GBP|Avg: £373 GBP|-5.5%
Jared
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Retailer 2£327 GBP
Retailer 4£336 GBP
Jared£388 GBP
Retailer 3£413 GBP

7 data points across 4 retailers

2 retailers£327 GBP to £388 GBP

B+
Cheapest Retailer
-
£327 GBP
$438 USD
Most Expensive
B
Jared
157190719 · Oct 30
£388 GBP
$520 USD
View
1 more retailer has this diamond
Prices start from £327 GBPSave up to £61 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+
0.40ct Oval
£327 GBP