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Marquise|Natural|GIA

0.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 2564717598

Certificate GIA 2564717598

Diamond specifications and retailer prices

From €642 EUR
SGD 973 SGD
As of October 31, 2026
Save €388 EUR (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €1,030 EUR at Frank Darling · As of November 2, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2564717598. Listed at 9 retailers as of October 31, 2026, with prices from €642 to €1,030, a €388 spread on the same certified stone. Frank Darling lists it at €1,030. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2564717598
Dimensions7.86 × 4.16 × 2.60 mm
L/W Ratio1.89
Culet sizeNone
Top View
7.86 mm4.16 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2564717598
Side View
Table 59.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 62.7%

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 31
Current: €1,030 EUR|Low: €642 EUR|High: €1,030 EUR|Avg: €806 EUR
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9€642 EUR
Retailer 5€657 EUR
Retailer 6€672 EUR
Retailer 7€690 EUR
Retailer 4€854 EUR
Retailer 2€885 EUR
Retailer 8€918 EUR
Retailer 3€963 EUR
Frank Darling€1,030 EUR

7 data points across 9 retailers

9 retailers€642 EUR to €1,030 EUR

B+
Cheapest Retailer
-
€642 EUR
SGD 973 SGD
B+
Retailer 2
-
€657 EUR
SGD 996 SGD
View
B+
Retailer 3
-
€672 EUR
$754 USD
View
B+
Retailer 4
-
€690 EUR
$774 USD
View
B
Retailer 5
-
€854 EUR
$958 USD
View
B
Retailer 6
-
€885 EUR
View
B
Retailer 7
-
€918 EUR
$1,030 USD
View
B
Retailer 8
-
€963 EUR
$1,080 USD
View
Most Expensive
B
Frank Darling
2709605HK · Nov 2
€1,030 EUR
$1,155 USD
View
8 more retailers have this diamond
Prices start from €642 EURSave up to €388 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.

B+
0.51ct Marquise
€642 EUR