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Round|Natural|IGI

1.51ct K SI2 Round Natural Diamond

EX • K/SI2 • IGI 648418562

Shape and cutting style on the report: Round brilliant

Certificate IGI 648418562

Diamond specifications and retailer prices

From €1,730 EUR
As of November 6, 2026
Save €3,344 EUR (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €5,074 EUR at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 648418562. Listed at 13 retailers as of November 5, 2026, with prices from €1,730 to €5,074, a €3,344 spread on the same certified stone. NZ Jewellers lists it at €5,074. 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

1.51
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle40.8°
OriginNatural
Grading LabIGI
CertificateIGI 648418562
Dimensions7.47 × 7.42 × 4.46 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
7.47 mm7.42 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 648418562
Side View
Table 58.0%Crown 33.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €1,730 EUR|Low: €1,730 EUR|High: €4,302 EUR|Avg: €2,628 EUR|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1€1,730 EUR
Retailer 6€2,173 EUR
Retailer 5€2,207 EUR
Retailer 7€2,214 EUR
Retailer 3€2,664 EUR
Retailer 2€3,203 EUR
Retailer 4€4,240 EUR

38 data points across 7 retailers

13 retailers€1,730 EUR to €5,074 EUR

A
Cheapest Retailer
-
€1,730 EUR
B+
Retailer 2
-
€2,173 EUR
View
A
Retailer 3
-
€2,207 EUR
View
B+
Retailer 4
-
€2,214 EUR
View
B+
Retailer 5
-
€2,427 EUR
View
Retailer 6
-
€2,427 EUR
View
Price last confirmed 8 days ago
B+
Retailer 7
-
€2,520 EUR
View
B+
Retailer 8
-
€2,553 EUR
View
A
Retailer 9
-
€2,664 EUR
View
B+
Retailer 10
-
€2,800 EUR
View
B+
Retailer 11
-
€3,203 EUR
View
B+
Retailer 12
-
€4,240 EUR
View
Most Expensive
B
NZ Jewellers
16172003-4e4c-4cee-b131-80db80be7fc9 · Nov 5
€5,074 EUR
$5,695 USD
View
12 more retailers have this diamond
Prices start from €1,730 EURSave up to €3,344 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
1.51ct Round
€1,730 EUR