Round|Natural|GIA

0.40ct J SI1 Round Natural Diamond

GD • J/SI1 • GIA 1353927431

Certificate GIA 1353927431

Diamond specifications and retailer prices

From £133 GBP
₹16,966 INR
As of October 30, 2026
Save £732 GBP (85%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £865 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 SI1 clarity (slightly-included), with a standard cut grade and certified by GIA 1353927431. Listed at 18 retailers as of October 30, 2026, with prices from £133 to £865, a £732 spread on the same certified stone. NZ Jewellers lists it at £865. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.40
Carat
J
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle33.5°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 1353927431
Dimensions4.76 × 4.75 × 2.83 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
4.76 mm4.75 mm0.40 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 1353927431
Side View
Table 63.0%Crown 33.5°Girdle: THN-THKPavilion 40.4°Culet: NoneDepth 59.4%

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 30
Current: £133 GBP|Low: £132 GBP|High: £446 GBP|Avg: £300 GBP|-3.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 1£133 GBP
Retailer 6£198 GBP
Retailer 2£296 GBP
Retailer 4£297 GBP
Retailer 8£306 GBP
Retailer 7£324 GBP
Retailer 3£388 GBP
Retailer 5£444 GBP

29 data points across 8 retailers

18 retailers£133 GBP to £865 GBP

A
Cheapest Retailer
-
£133 GBP
₹16,966 INR
B+
Retailer 2
-
£162 GBP
HK$1,700 HKD
View
B+
Retailer 3
-
£191 GBP
$256 USD
View
Retailer 4
-
£198 GBP
$265 USD
View
Price last confirmed 9 days ago
B+
Retailer 5
-
£203 GBP
SGD 367 SGD
View
B+
Retailer 6
-
£205 GBP
$275 USD
View
B+
Retailer 7
-
£213 GBP
$285 USD
View
B+
Retailer 8
-
£214 GBP
$287 USD
View
B+
Retailer 9
-
£257 GBP
$344 USD
View
B+
Retailer 10
-
£288 GBP
$386 USD
View
B+
Retailer 11
-
£296 GBP
ZAR 6,407 ZAR
View
B+
Retailer 12
-
£297 GBP
View
Retailer 13
-
£306 GBP
A$630 AUD
View
Price last confirmed 27 days ago
B+
Retailer 14
-
£310 GBP
$416 USD
View
B
Retailer 15
-
£388 GBP
View
B
Retailer 16
-
£444 GBP
View
B
Retailer 17
-
£446 GBP
View
Most Expensive
C
NZ Jewellers
15499dae-8135-43d7-9b18-feb88052580d · Oct 30
£865 GBP
$1,159 USD
View
17 more retailers have this diamond
Prices start from £133 GBPSave up to £732 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
£133 GBP