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Round|Natural|IGI

1.51ct K SI1 Round Natural Diamond

VG • K/SI1 • IGI 754512197

Shape and cutting style on the report: Round brilliant

Certificate IGI 754512197

Diamond specifications and retailer prices

From $2,930 AUD
As of November 6, 2026
Save $4,667 AUD (61%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,597 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 754512197. Listed at 20 retailers as of November 5, 2026, with prices from $2,930 to $7,597, a $4,667 spread on the same certified stone. NZ Jewellers lists it at $7,597. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle38.7°
Pavilion angle40.2°
OriginNatural
Grading LabIGI
CertificateIGI 754512197
Dimensions7.09 × 7.13 × 4.61 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.09 mm7.13 mm1.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 754512197
Side View
Table 57.0%Crown 38.7°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 64.8%

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: $7,597 AUD|Low: $2,930 AUD|High: $7,597 AUD|Avg: $4,209 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
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 2$2,930 AUD
Retailer 19$3,136 AUD
Retailer 10$3,283 AUD
Retailer 3$3,286 AUD
Retailer 17$3,303 AUD
Retailer 5$3,634 AUD
Retailer 7$3,634 AUD
Retailer 8$3,723 AUD
Retailer 6$3,801 AUD
Retailer 4$3,834 AUD
Retailer 14$3,891 AUD
Retailer 13$3,957 AUD
Retailer 9$4,090 AUD
Retailer 11$4,193 AUD
Retailer 15$4,263 AUD
Retailer 16$4,435 AUD
Retailer 18$4,508 AUD
Retailer 12$5,590 AUD
Retailer 20$6,365 AUD
NZ Jewellers$7,597 AUD

23 data points across 20 retailers

20 retailers$2,930 AUD to $7,597 AUD

A
Cheapest Retailer
-
$2,930 AUD
A
Retailer 2
-
$3,136 AUD
View
B+
Retailer 3
-
$3,283 AUD
View
A
Retailer 4
-
$3,286 AUD
View
A
Retailer 5
-
$3,303 AUD
View
B+
Retailer 6
-
$3,634 AUD
View
Retailer 7
-
$3,634 AUD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$3,723 AUD
View
B+
Retailer 9
-
$3,801 AUD
View
B+
Retailer 10
-
$3,834 AUD
View
B+
Retailer 11
-
$3,891 AUD
View
B+
Retailer 12
-
$3,957 AUD
View
B+
Retailer 13
-
$4,090 AUD
View
B+
Retailer 14
-
$4,193 AUD
View
B+
Retailer 15
-
$4,263 AUD
View
B+
Retailer 16
-
$4,435 AUD
View
B+
Retailer 17
-
$4,508 AUD
View
B+
Retailer 18
-
$5,590 AUD
View
B+
Retailer 19
-
$6,365 AUD
View
Most Expensive
B
NZ Jewellers
bbce782d-a238-4417-9b66-8eb95b477819 · Nov 5
$7,597 AUD
$5,318 USD
View
19 more retailers have this diamond
Prices start from $2,930 AUDSave up to $4,667 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.

A
1.51ct Round
$2,930 AUD