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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 $1,528 USD
As of November 5, 2026
Save $3,187 USD (68%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,715 USD 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 $1,528 to $4,715, a $3,187 spread on the same certified stone. NZ Jewellers lists it at $4,715. 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
Color
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: $2,105 USD|Low: $1,528 USD|High: $2,648 USD|Avg: $2,039 USD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2$1,528 USD
Retailer 5$1,747 USD
Retailer 7$1,933 USD
Retailer 6$1,975 USD
Retailer 1$2,105 USD
Retailer 3$2,359 USD
Retailer 4$2,623 USD

39 data points across 7 retailers

13 retailers$1,528 USD to $4,715 USD

A
Cheapest Retailer
-
$1,528 USD
B+
Retailer 2
-
$1,747 USD
View
B+
Retailer 3
-
$1,884 USD
View
B+
Retailer 4
-
$1,933 USD
View
Retailer 5
-
$1,933 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$1,975 USD
View
B+
Retailer 7
-
$2,023 USD
View
B+
Retailer 8
-
$2,071 USD
View
A
Retailer 9
-
$2,105 USD
View
B+
Retailer 10
-
$2,231 USD
View
B+
Retailer 11
-
$2,359 USD
View
B+
Retailer 12
-
$2,623 USD
View
Most Expensive
B
NZ Jewellers
8beecb8e-053c-42f6-8142-5f90efbb540c · Nov 5
$4,715 USD
View
12 more retailers have this diamond
Prices start from $1,528 USDSave up to $3,187 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
1.50ct Round
$1,528 USD