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Round|Natural|GIA

0.40ct J I1 Round Natural Diamond

EX • J/I1 • GIA 6422874640

Certificate GIA 6422874640

Diamond specifications and retailer prices

From £146 GBP
₹18,617 INR
As of October 31, 2026
Save £799 GBP (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £945 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.4ct natural round diamond

This 0.4ct natural round sits in the sub-half-carat band, graded J colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by GIA 6422874640. Listed at 9 retailers as of October 30, 2026, with prices from £146 to £945, a £799 spread on the same certified stone. NZ Jewellers lists it at £945. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.40
Carat
J
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6422874640
Dimensions4.68 × 4.72 × 2.95 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
4.68 mm4.72 mm0.40 ctJ / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6422874640
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £945 GBP|Low: £146 GBP|High: £945 GBP|Avg: £333 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 2£146 GBP
Retailer 7£208 GBP
Retailer 5£220 GBP
Retailer 9£225 GBP
Retailer 4£233 GBP
Retailer 8£281 GBP
Retailer 6£325 GBP
Retailer 3£401 GBP
NZ Jewellers£945 GBP

44 data points across 9 retailers

9 retailers£146 GBP to £945 GBP

A
Cheapest Retailer
-
£146 GBP
₹18,617 INR
B+
Retailer 2
-
£182 GBP
HK$1,900 HKD
View
B+
Retailer 3
-
£208 GBP
$279 USD
View
B+
Retailer 4
-
£225 GBP
$301 USD
View
B+
Retailer 5
-
£233 GBP
$312 USD
View
B+
Retailer 6
-
£281 GBP
$376 USD
View
B
Retailer 7
-
£325 GBP
$436 USD
View
B
Retailer 8
-
£401 GBP
€512 EUR
View
Most Expensive
C
NZ Jewellers
c5db5f0c-dfb3-47be-94c7-3925bf208e32 · Oct 30
£945 GBP
$1,266 USD
View
8 more retailers have this diamond
Prices start from £146 GBPSave up to £799 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
0.40ct Round
£146 GBP