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Round|Natural|GIA

0.40ct L SI1 Round Natural Diamond

EX • L/SI1 • GIA 6492539118

Certificate GIA 6492539118

Diamond specifications and retailer prices

From £181 GBP
As of November 6, 2026
Save £752 GBP (81%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £932 GBP at NZ Jewellers · As of November 4, 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 L colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6492539118. Listed at 14 retailers as of November 4, 2026, with prices from £181 to £932, a £752 spread on the same certified stone. NZ Jewellers lists it at £932. 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
L
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
Crown angle34°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6492539118
Dimensions4.71 × 4.73 × 2.89 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
4.71 mm4.73 mm0.40 ctL / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6492539118
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.3%

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: Nov 6
Current: £414 GBP|Low: £215 GBP|High: £422 GBP|Avg: £297 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7£217 GBP
Retailer 6£230 GBP
Retailer 5£238 GBP
Retailer 3£256 GBP
Retailer 4£320 GBP
Retailer 2£348 GBP
Retailer 8£357 GBP
Retailer 1£414 GBP

44 data points across 8 retailers

14 retailers£181 GBP to £932 GBP

A
Cheapest Retailer
-
£181 GBP
B+
Retailer 2
-
£206 GBP
View
Retailer 3
-
£221 GBP
View
Price last confirmed 8 days ago
B+
Retailer 4
-
£230 GBP
View
B+
Retailer 5
-
£238 GBP
View
B+
Retailer 6
-
£256 GBP
View
B+
Retailer 7
-
£277 GBP
View
B+
Retailer 8
-
£278 GBP
View
B+
Retailer 9
-
£320 GBP
View
B
Retailer 10
-
£348 GBP
View
B
Retailer 11
-
£357 GBP
View
B
Retailer 12
-
£375 GBP
View
B
Retailer 13
-
£414 GBP
View
Most Expensive
C
NZ Jewellers
7df04fd7-c2ff-4f23-bf40-c0b1edd1ff7b · Nov 4
£932 GBP
$1,255 USD
View
13 more retailers have this diamond
Prices start from £181 GBPSave up to £752 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
£181 GBP