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1.51ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 754512199

Shape and cutting style on the report: Round brilliant

Certificate IGI 754512199

Diamond specifications and retailer prices

From €1,914 EUR
As of November 6, 2026
Save €3,067 EUR (62%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €4,980 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 754512199. Listed at 19 retailers as of November 5, 2026, with prices from €1,914 to €4,980, a €3,067 spread on the same certified stone. NZ Jewellers lists it at €4,980. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 754512199
Dimensions7.17 × 7.23 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.17 mm7.23 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 754512199
Side View
Table 56.0%Crown 36.7°Girdle: Slightly ThickPavilion 40.5°Culet: NoneDepth 63.5%

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: €1,914 EUR|Low: €1,914 EUR|High: €4,223 EUR|Avg: €2,617 EUR|-2.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 1€1,914 EUR
Retailer 9€2,049 EUR
Retailer 6€2,160 EUR
Retailer 2€2,348 EUR
Retailer 10€2,420 EUR
Retailer 3€2,551 EUR
Retailer 4€2,789 EUR
Retailer 5€2,907 EUR
Retailer 7€2,942 EUR
Retailer 8€4,163 EUR

33 data points across 10 retailers

19 retailers€1,914 EUR to €4,980 EUR

A
Cheapest Retailer
-
€1,914 EUR
A
Retailer 2
-
€2,049 EUR
View
A
Retailer 3
-
€2,133 EUR
View
A
Retailer 4
-
€2,160 EUR
View
B+
Retailer 5
-
€2,348 EUR
View
Retailer 6
-
€2,382 EUR
View
Price last confirmed 8 days ago
B+
Retailer 7
-
€2,382 EUR
View
A
Retailer 8
-
€2,420 EUR
View
B+
Retailer 9
-
€2,424 EUR
View
B+
Retailer 10
-
€2,474 EUR
View
B+
Retailer 11
-
€2,508 EUR
View
A
Retailer 12
-
€2,551 EUR
View
B+
Retailer 13
-
€2,749 EUR
View
A
Retailer 14
-
€2,789 EUR
View
A
Retailer 15
-
€2,907 EUR
View
A
Retailer 16
-
€2,942 EUR
View
B+
Retailer 17
-
€3,655 EUR
View
B+
Retailer 18
-
€4,163 EUR
View
Most Expensive
B
NZ Jewellers
506969c5-90e3-475c-97b0-c094ff3fa585 · Nov 5
€4,980 EUR
$5,590 USD
View
18 more retailers have this diamond
Prices start from €1,914 EURSave up to €3,067 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
€1,914 EUR