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Marquise|Natural|GIA

0.40ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 6555748538

Certificate GIA 6555748538

Diamond specifications and retailer prices

From £267 GBP
₹34,176 INR
As of November 2, 2026
Save £575 GBP (68%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £842 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded G 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 6555748538. Listed at 14 retailers as of November 1, 2026, with prices from £267 to £842, a £575 spread on the same certified stone. MOH London lists it at £842. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6555748538
Dimensions7.31 × 3.89 × 2.36 mm
L/W Ratio1.88
Culet sizeNone
Key to symbols
Feather
Top View
7.31 mm3.89 mm0.40 ctG / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6555748538
Side View
Table 57.0%CrownGirdle: MED-MEDPavilionCulet: NoneDepth 60.7%

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 2
Current: £842 GBP|Low: £267 GBP|High: £1,397 GBP|Avg: £569 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 2£267 GBP
Retailer 9£364 GBP
Retailer 8£393 GBP
Retailer 5£421 GBP
Retailer 4£460 GBP
Retailer 10£500 GBP
Retailer 6£548 GBP
Retailer 3£738 GBP
MOH London£842 GBP
Retailer 7£1,397 GBP

31 data points across 10 retailers

14 retailers£267 GBP to £842 GBP

A
Cheapest Retailer
-
£267 GBP
₹34,176 INR
A
Retailer 2
-
£315 GBP
HK$3,300 HKD
View
Retailer 3
-
£341 GBP
$457 USD
View
Price last confirmed 40 days ago
B+
Retailer 4
-
£364 GBP
$489 USD
View
B+
Retailer 5
-
£384 GBP
SGD 696 SGD
View
B+
Retailer 6
-
£393 GBP
$527 USD
View
B
Retailer 7
-
£421 GBP
$565 USD
View
B
Retailer 8
-
£460 GBP
View
B
Retailer 9
-
£468 GBP
$628 USD
View
B
Retailer 10
-
£500 GBP
View
B
Retailer 11
-
£548 GBP
€701 EUR
View
B
Retailer 12
-
£738 GBP
View
Most Expensive
B
MOH London
20E8B75E6 · Nov 1
£842 GBP
View
12 more retailers have this diamond
Prices start from £267 GBPSave up to £575 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 Marquise
£267 GBP