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Marquise|Natural|GIA

0.51ct E SI1 Marquise Natural Diamond

ID • E/SI1 • GIA 3555796306

Certificate GIA 3555796306

Diamond specifications and retailer prices

From £699 GBP
$937 USD
As of October 30, 2026
Save £743 GBP (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,919 GBP at NZ Jewellers · As of October 30, 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 3555796306. Listed at 18 retailers as of October 25, 2026, with a 106% 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 3555796306
Dimensions8.83 × 4.00 × 2.46 mm
L/W Ratio2.21
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
8.83 mm4.00 mm0.51 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555796306
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 61.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,021 GBP|Low: £699 GBP|High: £1,459 GBP|Avg: £1,000 GBP|+2.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 9£699 GBP
Retailer 11£713 GBP
Retailer 7£720 GBP
Retailer 8£825 GBP
Retailer 3£886 GBP
Retailer 5£928 GBP
Retailer 1£1,021 GBP
Retailer 10£1,029 GBP
Retailer 4£1,215 GBP
Retailer 2£1,276 GBP
Retailer 6£1,443 GBP

44 data points across 11 retailers

18 retailers£699 GBP to £1,443 GBP

B+
Cheapest Retailer
-
£699 GBP
$937 USD
B+
Retailer 2
-
£704 GBP
$943 USD
View
B+
Retailer 3
-
£708 GBP
A$1,460 AUD
View
B+
Retailer 4
-
£713 GBP
$955 USD
View
B+
Retailer 5
-
£713 GBP
$955 USD
View
B+
Retailer 6
-
£720 GBP
$965 USD
View
B+
Retailer 7
-
£740 GBP
$992 USD
View
B+
Retailer 8
-
£822 GBP
$1,102 USD
View
B+
Retailer 9
-
£825 GBP
$1,105 USD
View
B+
Retailer 10
-
£886 GBP
$1,187 USD
View
B+
Retailer 11
-
£928 GBP
View
B
Retailer 12
-
£1,021 GBP
€1,303 EUR
View
Retailer 13
-
£1,029 GBP
A$2,121 AUD
View
Price last confirmed 26 days ago
B
Retailer 14
-
£1,030 GBP
$1,381 USD
View
B
Retailer 15
-
£1,215 GBP
ZAR 26,291 ZAR
View
B
Retailer 16
-
£1,276 GBP
CA$2,374 CAD
View
B
Retailer 17
-
£1,443 GBP
View
Most Expensive
NZ Jewellers
d4932268-9316-440b-8c79-7fc8808db737 · Oct 30
£1,919 GBP
$2,571 USD
View
Price under review
17 more retailers have this diamond
Prices start from £699 GBPSave up to £743 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
£699 GBP