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Marquise|Natural|GIA

0.51ct I SI2 Marquise Natural Diamond

VG • I/SI2 • GIA 6392602089

Certificate GIA 6392602089

Diamond specifications and retailer prices

From £740 GBP
As of November 5, 2026
Save £645 GBP (47%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £1,384 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6392602089. Listed at 5 retailers as of November 4, 2026, with prices from £740 to £1,384, a £645 spread on the same certified stone. MOH London lists it at £1,384. 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

0.51
Carat
I
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6392602089
Dimensions8.85 × 3.99 × 2.27 mm
L/W Ratio2.22
Top View
8.85 mm3.99 mm0.51 ctI / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6392602089
Side View
Table 60.0%CrownGirdle: THN-THKPavilionCulet: NoneDepth 56.8%

Caratlytics Score

How it works →
B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £1,384 GBP|Low: £721 GBP|High: £1,403 GBP|Avg: £945 GBP|+2.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 4, 2026
Retailer 3£732 GBP
Retailer 5£740 GBP
Retailer 4£757 GBP
Retailer 6£808 GBP
Retailer 2£1,058 GBP
Retailer 7£1,111 GBP
MOH London£1,384 GBP

20 data points across 7 retailers

5 retailers£740 GBP to £1,384 GBP

Retailer 1
-
£732 GBP
Price last confirmed 19 days ago
B
Retailer 2
-
£740 GBP
View
Retailer 3
-
£757 GBP
View
Price last confirmed 8 days ago
B
Retailer 4
-
£1,058 GBP
View
Most Expensive
C
MOH London
66D9DBCA7 · Nov 4
£1,384 GBP
View
4 more retailers have this diamond
Prices start from £740 GBPSave up to £645 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
0.51ct Marquise
£740 GBP