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1.50ct M SI1 Round Natural Diamond

EX • M/SI1 • IGI 550250291

Shape and cutting style on the report: Round brilliant

Certificate IGI 550250291

Diamond specifications and retailer prices

From $2,718 NZD
As of November 5, 2026
Save $5,669 NZD (68%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,388 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.5ct natural round diamond

This 1.5ct natural round sits in the one-and-a-half to two carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 550250291. Listed at 13 retailers as of November 5, 2026, with prices from $2,718 to $8,388, a $5,669 spread on the same certified stone. NZ Jewellers lists it at $8,388. 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

1.50
Carat
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.4°
Pavilion angle40.1°
OriginNatural
Grading LabIGI
CertificateIGI 550250291
Dimensions7.39 × 7.43 × 4.36 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
7.39 mm7.43 mm1.50 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 550250291
Side View
Table 61.5%Crown 32.4°Girdle: MED-STKPavilion 40.1°Culet: NoneDepth 58.7%

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 5
Current: $3,745 NZD|Low: $2,718 NZD|High: $4,711 NZD|Avg: $3,628 NZD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$2,718 NZD
Retailer 5$3,108 NZD
Retailer 7$3,439 NZD
Retailer 6$3,513 NZD
Retailer 1$3,745 NZD
Retailer 3$4,196 NZD
Retailer 4$4,666 NZD

39 data points across 7 retailers

13 retailers$2,718 NZD to $8,388 NZD

A
Cheapest Retailer
-
$2,718 NZD
B+
Retailer 2
-
$3,108 NZD
View
B+
Retailer 3
-
$3,351 NZD
View
B+
Retailer 4
-
$3,439 NZD
View
Retailer 5
-
$3,439 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$3,513 NZD
View
B+
Retailer 7
-
$3,599 NZD
View
B+
Retailer 8
-
$3,684 NZD
View
A
Retailer 9
-
$3,745 NZD
View
B+
Retailer 10
-
$3,969 NZD
View
B+
Retailer 11
-
$4,196 NZD
View
B+
Retailer 12
-
$4,666 NZD
View
Most Expensive
B
NZ Jewellers
8beecb8e-053c-42f6-8142-5f90efbb540c · Nov 5
$8,388 NZD
$4,715 USD
View
12 more retailers have this diamond
Prices start from $2,718 NZDSave up to $5,669 NZD

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
1.50ct Round
$2,718 NZD