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Marquise|Natural|GIA

0.51ct F SI2 Marquise Natural Diamond

VG • F/SI2 • GIA 6565139322

Certificate GIA 6565139322

Diamond specifications and retailer prices

From £454 GBP
SGD 824 SGD
As of November 2, 2026
Save £316 GBP (41%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £770 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6565139322. Listed at 7 retailers as of November 2, 2026, with prices from £454 to £770, a £316 spread on the same certified stone. Frank Darling lists it at £770. 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
F
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565139322
Dimensions7.90 × 4.17 × 2.65 mm
L/W Ratio1.89
Culet sizeNone
Top View
7.90 mm4.17 mm0.51 ctF / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6565139322
Side View
Table 59.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £770 GBP|Low: £454 GBP|High: £770 GBP|Avg: £588 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 9£454 GBP
Retailer 5£459 GBP
Retailer 7£466 GBP
Retailer 2£533 GBP
Retailer 8£590 GBP
Retailer 6£635 GBP
Retailer 3£642 GBP
Retailer 4£665 GBP
Retailer 10£680 GBP
Frank Darling£770 GBP

26 data points across 10 retailers

7 retailers£454 GBP to £770 GBP

A
Cheapest Retailer
-
£454 GBP
SGD 824 SGD
Retailer 2
-
£466 GBP
$625 USD
View
Price last confirmed 25 days ago
B+
Retailer 3
-
£533 GBP
View
B+
Retailer 4
-
£590 GBP
$792 USD
View
B+
Retailer 5
-
£642 GBP
View
Retailer 6
-
£680 GBP
$912 USD
View
Price last confirmed 23 days ago
Most Expensive
B
Frank Darling
2679412HK · Nov 2
£770 GBP
$1,033 USD
View
6 more retailers have this diamond
Prices start from £454 GBPSave up to £316 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.

A
0.51ct Marquise
£454 GBP