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Marquise|Natural|GIA

0.42ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 3565335187

Certificate GIA 3565335187

Diamond specifications and retailer prices

From £227 GBP
$305 USD
As of November 1, 2026
Save £84 GBP (27%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £311 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.42ct natural marquise diamond

This 0.42ct 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 3565335187. Listed at 3 retailers as of November 1, 2026, with prices from £227 to £311, a £84 spread on the same certified stone. 77 Diamonds lists it at £311. 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

0.42
Carat
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3565335187
Dimensions7.23 × 3.90 × 2.52 mm
L/W Ratio1.85
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather
Top View
7.23 mm3.90 mm0.42 ctJ / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 3565335187
Side View
Table 61.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 64.5%

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 1
Current: £311 GBP|Low: £227 GBP|High: £311 GBP|Avg: £267 GBP|+5.5%
77 Diamonds
Retailer 2
Retailer 3
November 2, 2026
Retailer 2£227 GBP
Retailer 3£243 GBP
77 Diamonds£311 GBP

34 data points across 3 retailers

3 retailers£227 GBP to £311 GBP

B+
Cheapest Retailer
-
£227 GBP
$305 USD
B+
Retailer 2
-
£243 GBP
SGD 440 SGD
View
Most Expensive
B
77 Diamonds
MQCPBBSBEXSN · Nov 2
£311 GBP
View
2 more retailers have this diamond
Prices start from £227 GBPSave up to £84 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+
0.42ct Marquise
£227 GBP