Marquise|Natural|GIA

0.51ct K SI1 Marquise Natural Diamond

EX • K/SI1 • GIA 7566603273

Certificate GIA 7566603273

Diamond specifications and retailer prices

From €369 EUR
As of November 6, 2026
Save €387 EUR (51%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: €756 EUR at Frank Darling · As of November 6, 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 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 7566603273. Listed at 11 retailers as of November 6, 2026, with prices from €369 to €756, a €387 spread on the same certified stone. Frank Darling lists it at €756. 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36.24°
Pavilion angle41.54°
OriginNatural
Grading LabGIA
CertificateGIA 7566603273
Dimensions8.13 × 4.12 × 2.65 mm
L/W Ratio1.97
Culet sizeNone
Top View
8.13 mm4.12 mm0.51 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 7566603273
Side View
Table 58.0%Crown 36.24°Girdle: THN-VTKPavilion 41.54°Culet: NoneDepth 64.4%

Caratlytics Score

How it works →
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 6
Current: €756 EUR|Low: €369 EUR|High: €756 EUR|Avg: €493 EUR
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8€369 EUR
Retailer 10€385 EUR
Retailer 6€401 EUR
Retailer 11€417 EUR
Retailer 5€442 EUR
Retailer 3€479 EUR
Retailer 9€516 EUR
Retailer 2€541 EUR
Retailer 7€553 EUR
Retailer 4€633 EUR
Frank Darling€756 EUR

23 data points across 11 retailers

11 retailers€369 EUR to €756 EUR

A
Cheapest Retailer
-
€369 EUR
A
Retailer 2
-
€385 EUR
View
A
Retailer 3
-
€401 EUR
View
A
Retailer 4
-
€417 EUR
View
A
Retailer 5
-
€442 EUR
View
B+
Retailer 6
-
€479 EUR
View
B+
Retailer 7
-
€516 EUR
View
B+
Retailer 8
-
€541 EUR
View
B+
Retailer 9
-
€553 EUR
View
B+
Retailer 10
-
€633 EUR
View
Most Expensive
B
Frank Darling
2702647HK · Nov 6
€756 EUR
$844 USD
View
10 more retailers have this diamond
Prices start from €369 EURSave up to €387 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
€369 EUR