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Marquise|Natural|GIA

0.42ct H SI1 Marquise Natural Diamond

GD • H/SI1 • GIA 6551423546

Certificate GIA 6551423546

Diamond specifications and retailer prices

From £296 GBP
MYR 1,616 MYR
As of November 2, 2026
Save £119 GBP (29%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £414 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 H 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 6551423546. Listed at 4 retailers as of November 2, 2026, with prices from £296 to £414, a £119 spread on the same certified stone. 77 Diamonds lists it at £414. 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
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishGood
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551423546
Dimensions7.63 × 3.96 × 2.45 mm
L/W Ratio1.93
Culet sizeNone
Key to symbols
Feather, Twinning Wisp
Top View
7.63 mm3.96 mm0.42 ctH / SI1
OriginNatural
CutGood
PolishGood
SymmetryVery Good
FluorescenceNone
CertificateGIA 6551423546
Side View
Table 63.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 61.8%

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: £414 GBP|Low: £284 GBP|High: £418 GBP|Avg: £347 GBP|+0.6%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4£296 GBP
Retailer 3£331 GBP
Retailer 2£355 GBP
77 Diamonds£414 GBP

40 data points across 4 retailers

4 retailers£296 GBP to £414 GBP

B+
Cheapest Retailer
-
£296 GBP
MYR 1,616 MYR
B+
Retailer 2
-
£331 GBP
$444 USD
View
Final sale: no returns
B
Retailer 3
-
£355 GBP
SGD 643 SGD
View
Most Expensive
B
77 Diamonds
MQCPMXRJ6WYA · Nov 2
£414 GBP
View
3 more retailers have this diamond
Prices start from £296 GBPSave up to £119 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
£296 GBP