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0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 7426956403

Certificate GIA 7426956403

Diamond specifications and retailer prices

From €753 EUR
As of November 6, 2026
Save €895 EUR (54%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: €1,648 EUR at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7426956403. Listed at 12 retailers as of November 4, 2026, with prices from €753 to €1,648, a €895 spread on the same certified stone. MOH London lists it at €1,648. 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 7426956403
Dimensions5.18 × 5.14 × 3.16 mm
L/W Ratio1.01
Top View
5.18 mm5.14 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 7426956403
Side View
Table 56.0%Crown 34°Girdle: MediumPavilion 41.2°Culet: NoneDepth 61.3%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: €1,648 EUR|Low: €644 EUR|High: €1,671 EUR|Avg: €1,083 EUR|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 6€753 EUR
Retailer 5€761 EUR
Retailer 4€834 EUR
Retailer 7€848 EUR
Retailer 3€1,050 EUR
Retailer 2€1,172 EUR
MOH London€1,648 EUR

42 data points across 7 retailers

12 retailers€753 EUR to €1,648 EUR

B+
Cheapest Retailer
-
€753 EUR
Final sale: no returns
B+
Retailer 2
-
€761 EUR
View
B+
Retailer 3
-
€834 EUR
View
B+
Retailer 4
-
€848 EUR
View
Retailer 5
-
€942 EUR
View
Price last confirmed 10 days ago
B
Retailer 6
-
€1,003 EUR
View
B
Retailer 7
-
€1,003 EUR
View
B
Retailer 8
-
€1,039 EUR
View
B
Retailer 9
-
€1,050 EUR
View
B
Retailer 10
-
€1,172 EUR
View
Most Expensive
B
MOH London
F91F95726 · Nov 4
€1,648 EUR
£1,449 GBP
View
10 more retailers have this diamond
Prices start from €753 EURSave up to €895 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 Round
€753 EUR