Marquise|Natural|GIA

0.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 6542875575

Certificate GIA 6542875575

Diamond specifications and retailer prices

From €368 EUR
As of November 5, 2026
Save €1,042 EUR (74%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €1,410 EUR at NZ Jewellers · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6542875575. Listed at 11 retailers as of November 5, 2026, with prices from €368 to €1,410, a €1,042 spread on the same certified stone. NZ Jewellers lists it at €1,410. 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
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6542875575
Dimensions8.25 × 4.10 × 2.70 mm
L/W Ratio2.01
Top View
8.25 mm4.10 mm0.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6542875575
Side View
Table 57.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 65.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: €1,410 EUR|Low: €368 EUR|High: €1,454 EUR|Avg: €553 EUR|-3.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9€368 EUR
Retailer 7€396 EUR
Retailer 3€400 EUR
Retailer 4€400 EUR
Retailer 8€425 EUR
Retailer 10€425 EUR
Retailer 2€449 EUR
Retailer 5€451 EUR
Retailer 11€560 EUR
Retailer 6€848 EUR
NZ Jewellers€1,410 EUR

36 data points across 11 retailers

11 retailers€368 EUR to €1,410 EUR

A
Cheapest Retailer
-
€368 EUR
A
Retailer 2
-
€396 EUR
View
Retailer 3
-
€400 EUR
View
Price last confirmed 8 days ago
A
Retailer 4
-
€400 EUR
View
A
Retailer 5
-
€425 EUR
View
A
Retailer 6
-
€425 EUR
View
A
Retailer 7
-
€449 EUR
View
A
Retailer 8
-
€451 EUR
View
B+
Retailer 9
-
€560 EUR
View
B
Retailer 10
-
€848 EUR
View
Most Expensive
B
NZ Jewellers
6fbe9dc0-4941-4bfd-b195-6b925748c946 · Nov 5
€1,410 EUR
$1,574 USD
View
10 more retailers have this diamond
Prices start from €368 EURSave up to €1,042 EUR

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
€368 EUR