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Marquise|Natural|GIA

0.40ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 2558171173

Certificate GIA 2558171173

Diamond specifications and retailer prices

From £231 GBP
$310 USD
As of November 2, 2026
Save £79 GBP (26%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £310 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 SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2558171173. Listed at 3 retailers as of November 2, 2026, with prices from £231 to £310, a £79 spread on the same certified stone. 77 Diamonds lists it at £310. 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 (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2558171173
Dimensions7.38 × 3.85 × 2.43 mm
L/W Ratio1.92
Top View
7.38 mm3.85 mm0.40 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2558171173
Side View
Table 61.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 63.2%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: £310 GBP|Low: £231 GBP|High: £318 GBP|Avg: £273 GBP|-0.6%
77 Diamonds
Retailer 2
Retailer 3
November 2, 2026
Retailer 2£231 GBP
Retailer 3£242 GBP
77 Diamonds£310 GBP

39 data points across 3 retailers

3 retailers£231 GBP to £310 GBP

B+
Cheapest Retailer
-
£231 GBP
$310 USD
Final sale: no returns
B+
Retailer 2
-
£242 GBP
SGD 438 SGD
View
Most Expensive
B
77 Diamonds
MQCPSQNRNPZT · Nov 2
£310 GBP
View
2 more retailers have this diamond
Prices start from £231 GBPSave up to £79 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
£231 GBP