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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

ID • E/SI1 • GIA 6552812953

Certificate GIA 6552812953

Diamond specifications and retailer prices

From £439 GBP
HK$4,600 HKD
As of October 30, 2026
Save £625 GBP (59%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,813 GBP at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6552812953. Listed at 17 retailers as of October 29, 2026, with a 142% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552812953
Dimensions7.83 × 4.28 × 2.64 mm
L/W Ratio1.83
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
7.83 mm4.28 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552812953
Side View
Table 58.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 61.8%

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: Oct 30
Current: £596 GBP|Low: £413 GBP|High: £1,072 GBP|Avg: £652 GBP|+14.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 8£439 GBP
Retailer 2£440 GBP
Retailer 6£533 GBP
Retailer 1£596 GBP
Retailer 3£695 GBP
Retailer 5£705 GBP
Retailer 7£869 GBP
Retailer 4£1,064 GBP

43 data points across 8 retailers

17 retailers£439 GBP to £1,064 GBP

A
Cheapest Retailer
-
£439 GBP
HK$4,600 HKD
A
Retailer 2
-
£440 GBP
₹56,140 INR
View
A
Retailer 3
-
£533 GBP
$714 USD
View
Final sale: no returns
Retailer 4
-
£578 GBP
$775 USD
View
Price last confirmed 15 days ago
Retailer 5
-
£578 GBP
$775 USD
View
Price last confirmed 10 days ago
A
Retailer 6
-
£587 GBP
$786 USD
View
A
Retailer 7
-
£596 GBP
$799 USD
View
Retailer 8
-
£600 GBP
$804 USD
View
Price last confirmed 14 days ago
A
Retailer 9
-
£611 GBP
SGD 1,107 SGD
View
Retailer 10
-
£667 GBP
$894 USD
View
Price last confirmed 12 days ago
B+
Retailer 11
-
£677 GBP
$907 USD
View
B+
Retailer 12
-
£695 GBP
View
B+
Retailer 13
-
£705 GBP
$945 USD
View
B+
Retailer 14
-
£784 GBP
$1,050 USD
View
Retailer 15
-
£869 GBP
A$1,792 AUD
View
Price last confirmed 27 days ago
B
Retailer 16
-
£1,064 GBP
View
Most Expensive
NZ Jewellers
ba939c1f-2809-4921-8d8e-37c312bb936f · Oct 17
£1,813 GBP
$2,429 USD
View
Price last confirmed 13 days ago
16 more retailers have this diamond
Prices start from £439 GBPSave up to £625 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
£439 GBP