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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 $1,942 USD
As of November 6, 2026
Save $3,753 USD (66%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $5,695 USD 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 $1,942 to $5,695, a $3,753 spread on the same certified stone. NZ Jewellers lists it at $5,695. 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
Color
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: $1,942 USD|Low: $1,942 USD|High: $4,829 USD|Avg: $2,950 USD|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$1,942 USD
Retailer 6$2,439 USD
Retailer 5$2,477 USD
Retailer 7$2,485 USD
Retailer 3$2,990 USD
Retailer 2$3,595 USD
Retailer 4$4,759 USD

38 data points across 7 retailers

13 retailers$1,942 USD to $5,695 USD

A
Cheapest Retailer
-
$1,942 USD
B+
Retailer 2
-
$2,439 USD
View
A
Retailer 3
-
$2,477 USD
View
B+
Retailer 4
-
$2,485 USD
View
B+
Retailer 5
-
$2,724 USD
View
Retailer 6
-
$2,724 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
$2,829 USD
View
B+
Retailer 8
-
$2,865 USD
View
A
Retailer 9
-
$2,990 USD
View
B+
Retailer 10
-
$3,143 USD
View
B+
Retailer 11
-
$3,595 USD
View
B+
Retailer 12
-
$4,759 USD
View
Most Expensive
B
NZ Jewellers
16172003-4e4c-4cee-b131-80db80be7fc9 · Nov 5
$5,695 USD
View
12 more retailers have this diamond
Prices start from $1,942 USDSave up to $3,753 USD

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
$1,942 USD