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Marquise|Natural|GIA

0.51ct E SI2 Marquise Natural Diamond

EX • E/SI2 • GIA 6545321237

Certificate GIA 6545321237

Diamond specifications and retailer prices

From £547 GBP
As of November 5, 2026
Save £622 GBP (53%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,169 GBP at Diamond Exchange Canada · As of November 5, 2026
View at Diamond Exchange Canada

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545321237. Listed at 11 retailers as of November 5, 2026, with prices from £547 to £1,169, a £622 spread on the same certified stone. Diamond Exchange Canada lists it at £1,169. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
E
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Pavilion angle41.3°
OriginNatural
Grading LabGIA
CertificateGIA 6545321237
Dimensions8.19 × 4.21 × 2.68 mm
L/W Ratio1.95
Top View
8.19 mm4.21 mm0.51 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6545321237
Side View
Table 58.0%CrownGirdle: MED-VTKPavilion 41.3°Culet: NoneDepth 63.5%

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 5
Current: £1,169 GBP|Low: £380 GBP|High: £1,169 GBP|Avg: £750 GBP
Diamond Exchange Canada
Retailer 2
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Retailer 12
Retailer 13
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Retailer 18
November 6, 2026
Retailer 10£380 GBP
Retailer 11£547 GBP
Retailer 15£605 GBP
Retailer 8£634 GBP
Retailer 5£643 GBP
Retailer 3£649 GBP
Retailer 13£662 GBP
Retailer 18£662 GBP
Retailer 9£687 GBP
Retailer 12£744 GBP
Retailer 16£792 GBP
Retailer 4£802 GBP
Retailer 7£802 GBP
Retailer 14£811 GBP
Retailer 6£825 GBP
Retailer 2£932 GBP
Retailer 17£1,101 GBP
Diamond Exchange Canada£1,169 GBP

19 data points across 18 retailers

11 retailers£547 GBP to £1,169 GBP

A
Cheapest Retailer
-
£547 GBP
B+
Retailer 2
-
£605 GBP
View
B+
Retailer 3
-
£649 GBP
View
B+
Retailer 4
-
£662 GBP
View
B+
Retailer 5
-
£744 GBP
View
B
Retailer 6
-
£802 GBP
View
B
Retailer 7
-
£802 GBP
View
B
Retailer 8
-
£811 GBP
View
B+
Retailer 9
-
£825 GBP
View
B
Retailer 10
-
£932 GBP
View
Most Expensive
B
Diamond Exchange Canada
1982807032 · Nov 5
£1,169 GBP
CA$2,185 CAD
View
10 more retailers have this diamond
Prices start from £547 GBPSave up to £622 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
£547 GBP