Marquise|Natural|IGI

1.50ct I SI1 Marquise Natural Diamond

EX • I/SI1 • IGI 809693540

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 809693540

Diamond specifications and retailer prices

From $5,280 USD
As of November 4, 2026
Save $6,310 USD (54%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $11,590 USD at NZ Jewellers · As of November 7, 2026
View at NZ Jewellers

About this 1.5ct natural marquise diamond

This 1.5ct natural marquise sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 809693540. Listed at 13 retailers as of November 4, 2026, with prices from $5,280 to $11,590, a $6,310 spread on the same certified stone. NZ Jewellers lists it at $11,590. 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
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.8°
Pavilion angle39.4°
OriginNatural
Grading LabIGI
CertificateIGI 809693540
Dimensions11.26 × 6.07 × 3.71 mm
L/W Ratio1.86
Girdle conditionFaceted
Top View
11.26 mm6.07 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 809693540
Side View
Table 58.0%Crown 37.8°Girdle: Slightly ThickPavilion 39.4°CuletDepth 61.7%

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 4
Current: $11,590 USD|Low: $5,280 USD|High: $11,590 USD|Avg: $7,271 USD
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
November 7, 2026
Retailer 5$5,280 USD
Retailer 12$6,044 USD
Retailer 2$6,069 USD
Retailer 4$6,396 USD
Retailer 13$6,420 USD
Retailer 6$6,582 USD
Retailer 7$7,036 USD
Retailer 8$7,089 USD
Retailer 9$7,249 USD
Retailer 11$7,996 USD
Retailer 10$8,455 USD
Retailer 3$10,181 USD
NZ Jewellers$11,590 USD

4 data points across 13 retailers

13 retailers$5,280 USD to $11,590 USD

A
Cheapest Retailer
-
$5,280 USD
B+
Retailer 2
-
$6,044 USD
View
B+
Retailer 3
-
$6,069 USD
View
B+
Retailer 4
-
$6,396 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,420 USD
View
B+
Retailer 6
-
$6,582 USD
View
B+
Retailer 7
-
$7,036 USD
View
B+
Retailer 8
-
$7,089 USD
View
B+
Retailer 9
-
$7,249 USD
View
B+
Retailer 10
-
$7,996 USD
View
B
Retailer 11
-
$8,455 USD
View
B
Retailer 12
-
$10,181 USD
View
Most Expensive
B
NZ Jewellers
705cbe29-8e73-4adb-85a8-574bf5963843 · Nov 7
$11,590 USD
View
12 more retailers have this diamond
Prices start from $5,280 USDSave up to $6,310 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 Marquise
$5,280 USD