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Marquise|Natural|GIA

0.40ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 1557825111

Certificate GIA 1557825111

Diamond specifications and retailer prices

From £233 GBP
SGD 421 SGD
As of November 2, 2026
Save £66 GBP (22%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £299 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 1557825111. Listed at 2 retailers as of November 2, 2026, with prices from £233 to £299, a £66 spread on the same certified stone. 77 Diamonds lists it at £299. 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
PolishGood
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1557825111
Dimensions6.84 × 3.81 × 2.57 mm
L/W Ratio1.80
Culet sizeNone
Key to symbols
Cloud, Crystal, Knot, Feather
Top View
6.84 mm3.81 mm0.40 ctI / SI2
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceFaint
CertificateGIA 1557825111
Side View
Table 59.0%CrownGirdle: STK-ETKPavilionCulet: NoneDepth 67.5%

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: £299 GBP|Low: £233 GBP|High: £299 GBP|Avg: £271 GBP|+3.3%
77 Diamonds
Retailer 2
November 2, 2026
Retailer 2£233 GBP
77 Diamonds£299 GBP

39 data points across 2 retailers

2 retailers£233 GBP to £299 GBP

B+
Cheapest Retailer
-
£233 GBP
SGD 421 SGD
Most Expensive
B
77 Diamonds
MQCPRUKVSJ47 · Nov 2
£299 GBP
View
1 more retailer has this diamond
Prices start from £233 GBPSave up to £66 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
£233 GBP