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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 $2,051 USD
As of November 6, 2026
Save $3,267 USD (61%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,318 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 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 $2,051 to $5,318, a $3,267 spread on the same certified stone. NZ Jewellers lists it at $5,318. 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
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: $5,318 USD|Low: $2,051 USD|High: $5,318 USD|Avg: $2,947 USD
NZ Jewellers
Retailer 2
Retailer 3
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Retailer 5
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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$2,051 USD
Retailer 19$2,195 USD
Retailer 10$2,298 USD
Retailer 3$2,300 USD
Retailer 17$2,312 USD
Retailer 5$2,544 USD
Retailer 7$2,544 USD
Retailer 8$2,606 USD
Retailer 6$2,661 USD
Retailer 4$2,684 USD
Retailer 14$2,724 USD
Retailer 13$2,770 USD
Retailer 9$2,863 USD
Retailer 11$2,935 USD
Retailer 15$2,984 USD
Retailer 16$3,105 USD
Retailer 18$3,156 USD
Retailer 12$3,913 USD
Retailer 20$4,456 USD
NZ Jewellers$5,318 USD

23 data points across 20 retailers

20 retailers$2,051 USD to $5,318 USD

A
Cheapest Retailer
-
$2,051 USD
A
Retailer 2
-
$2,195 USD
View
B+
Retailer 3
-
$2,298 USD
View
A
Retailer 4
-
$2,300 USD
View
A
Retailer 5
-
$2,312 USD
View
B+
Retailer 6
-
$2,544 USD
View
Retailer 7
-
$2,544 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$2,606 USD
View
B+
Retailer 9
-
$2,661 USD
View
B+
Retailer 10
-
$2,684 USD
View
B+
Retailer 11
-
$2,724 USD
View
B+
Retailer 12
-
$2,770 USD
View
B+
Retailer 13
-
$2,863 USD
View
B+
Retailer 14
-
$2,935 USD
View
B+
Retailer 15
-
$2,984 USD
View
B+
Retailer 16
-
$3,105 USD
View
B+
Retailer 17
-
$3,156 USD
View
B+
Retailer 18
-
$3,913 USD
View
B+
Retailer 19
-
$4,456 USD
View
Most Expensive
B
NZ Jewellers
bbce782d-a238-4417-9b66-8eb95b477819 · Nov 5
$5,318 USD
View
19 more retailers have this diamond
Prices start from $2,051 USDSave up to $3,267 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
$2,051 USD