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Marquise|Natural|GIA

0.40ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 5556021739

Certificate GIA 5556021739

Diamond specifications and retailer prices

From £226 GBP
$303 USD
As of November 2, 2026
Save £77 GBP (25%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £303 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.4ct natural marquise diamond

This 0.4ct natural marquise sits in the sub-half-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 5556021739. Listed at 3 retailers as of November 2, 2026, with prices from £226 to £303, a £77 spread on the same certified stone. 77 Diamonds lists it at £303. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5556021739
Dimensions7.66 × 3.96 × 2.43 mm
L/W Ratio1.93
Top View
7.66 mm3.96 mm0.40 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 5556021739
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 61.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £303 GBP|Low: £196 GBP|High: £316 GBP|Avg: £255 GBP|-2.1%
77 Diamonds
Retailer 2
Retailer 3
November 2, 2026
Retailer 2£226 GBP
Retailer 3£236 GBP
77 Diamonds£303 GBP

39 data points across 3 retailers

3 retailers£226 GBP to £303 GBP

B+
Cheapest Retailer
-
£226 GBP
$303 USD
Final sale: no returns
B+
Retailer 2
-
£236 GBP
SGD 428 SGD
View
Most Expensive
B+
77 Diamonds
MQCPEHJQTGCX · Nov 2
£303 GBP
View
2 more retailers have this diamond
Prices start from £226 GBPSave up to £77 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 Marquise
£226 GBP