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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 $2,600 AUD
As of November 4, 2026
Save $4,286 AUD (62%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $6,885 AUD 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 $2,600 to $6,885, a $4,286 spread on the same certified stone. NZ Jewellers lists it at $6,885. 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
Colour
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: $6,885 AUD|Low: $1,964 AUD|High: $6,885 AUD|Avg: $3,828 AUD
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$2,600 AUD
Retailer 2$2,887 AUD
Retailer 14$3,000 AUD
Retailer 11$3,048 AUD
Retailer 3$3,293 AUD
Retailer 5$3,293 AUD
Retailer 13$3,400 AUD
Retailer 15$3,446 AUD
Retailer 6$3,491 AUD
Retailer 4$3,800 AUD
Retailer 7$3,918 AUD
Retailer 9$4,093 AUD
Retailer 12$4,650 AUD
Retailer 8$5,754 AUD
NZ Jewellers$6,885 AUD

34 data points across 15 retailers

16 retailers$2,600 AUD to $6,885 AUD

Retailer 1
-
$1,964 AUD
Price last confirmed 43 days ago
B+
Retailer 2
-
$2,600 AUD
View
B+
Retailer 3
-
$2,887 AUD
View
B+
Retailer 4
-
$2,974 AUD
View
B+
Retailer 5
-
$3,000 AUD
View
B+
Retailer 6
-
$3,048 AUD
View
B+
Retailer 7
-
$3,293 AUD
View
Retailer 8
-
$3,293 AUD
View
Price last confirmed 12 days ago
B+
Retailer 9
-
$3,400 AUD
View
B+
Retailer 10
-
$3,446 AUD
View
B+
Retailer 11
-
$3,491 AUD
View
B+
Retailer 12
-
$3,800 AUD
View
B+
Retailer 13
-
$4,093 AUD
View
B+
Retailer 14
-
$4,650 AUD
View
B+
Retailer 15
-
$5,754 AUD
View
Most Expensive
B
NZ Jewellers
856628e2-e34b-42a0-82cc-1cc28a2772fb · Nov 5
$6,885 AUD
$4,820 USD
View
15 more retailers have this diamond
Prices start from $2,600 AUDSave up to $4,286 AUD

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
$2,600 AUD