Round|Natural|IGI

1.51ct K SI2 Round Natural Diamond

VG • K/SI2 • IGI 581308742

Shape and cutting style on the report: Round brilliant

Certificate IGI 581308742

Diamond specifications and retailer prices

From $1,820 USD
As of November 4, 2026
Save $3,000 USD (62%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $4,820 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 very-good cut grade and certified by IGI 581308742. Listed at 16 retailers as of November 4, 2026, with prices from $1,820 to $4,820, a $3,000 spread on the same certified stone. NZ Jewellers lists it at $4,820. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
K
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle31.8°
Pavilion angle42°
OriginNatural
Grading LabIGI
CertificateIGI 581308742
Dimensions7.35 × 7.26 × 4.46 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.35 mm7.26 mm1.51 ctK / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateIGI 581308742
Side View
Table 66.0%Crown 31.8°Girdle: MED-THKPavilion 42°Culet: NoneDepth 60.9%

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: Nov 4
Current: $4,820 USD|Low: $1,375 USD|High: $4,820 USD|Avg: $2,680 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 5, 2026
Retailer 10$1,820 USD
Retailer 2$2,021 USD
Retailer 14$2,100 USD
Retailer 11$2,134 USD
Retailer 3$2,305 USD
Retailer 5$2,305 USD
Retailer 13$2,380 USD
Retailer 15$2,412 USD
Retailer 6$2,444 USD
Retailer 4$2,660 USD
Retailer 7$2,743 USD
Retailer 9$2,865 USD
Retailer 12$3,255 USD
Retailer 8$4,028 USD
NZ Jewellers$4,820 USD

34 data points across 15 retailers

16 retailers$1,820 USD to $4,820 USD

Retailer 1
-
$1,375 USD
Price last confirmed 43 days ago
B+
Retailer 2
-
$1,820 USD
View
B+
Retailer 3
-
$2,021 USD
View
B+
Retailer 4
-
$2,082 USD
View
B+
Retailer 5
-
$2,100 USD
View
B+
Retailer 6
-
$2,134 USD
View
B+
Retailer 7
-
$2,305 USD
View
Retailer 8
-
$2,305 USD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
$2,380 USD
View
B+
Retailer 10
-
$2,412 USD
View
B+
Retailer 11
-
$2,444 USD
View
B+
Retailer 12
-
$2,660 USD
View
B+
Retailer 13
-
$2,865 USD
View
B+
Retailer 14
-
$3,255 USD
View
B+
Retailer 15
-
$4,028 USD
View
Most Expensive
B
NZ Jewellers
856628e2-e34b-42a0-82cc-1cc28a2772fb · Nov 5
$4,820 USD
View
15 more retailers have this diamond
Prices start from $1,820 USDSave up to $3,000 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.

B+
1.51ct Round
$1,820 USD