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Marquise|Natural|GIA

0.40ct J SI2 Marquise Natural Diamond

GD • J/SI2 • GIA 6551813414

Certificate GIA 6551813414

Diamond specifications and retailer prices

From £218 GBP
$292 USD
As of November 2, 2026
Save £73 GBP (25%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £290 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 J 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 6551813414. Listed at 3 retailers as of November 2, 2026, with prices from £218 to £290, a £73 spread on the same certified stone. 77 Diamonds lists it at £290. 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
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6551813414
Dimensions6.85 × 3.90 × 2.58 mm
L/W Ratio1.76
Culet sizeNone
Key to symbols
Cloud, Twinning Wisp, Feather
Top View
6.85 mm3.90 mm0.40 ctJ / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551813414
Side View
Table 55.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 66.0%

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: £290 GBP|Low: £184 GBP|High: £290 GBP|Avg: £239 GBP|+3.2%
77 Diamonds
Retailer 2
Retailer 3
November 2, 2026
Retailer 3£218 GBP
Retailer 2£226 GBP
77 Diamonds£290 GBP

40 data points across 3 retailers

3 retailers£218 GBP to £290 GBP

B+
Cheapest Retailer
-
£218 GBP
$292 USD
Final sale: no returns
B+
Retailer 2
-
£226 GBP
SGD 409 SGD
View
Most Expensive
B
77 Diamonds
MQCPWBWRKD7E · Nov 2
£290 GBP
View
2 more retailers have this diamond
Prices start from £218 GBPSave up to £73 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
£218 GBP