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Marquise|Natural|GIA

1.50ct I SI2 Marquise Natural Diamond

ID • I/SI2 • GIA 1555664423

Certificate GIA 1555664423

Diamond specifications and retailer prices

From $6,220 USD
As of November 1, 2026
Save $5,366 USD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $11,586 USD at MOH London · As of November 1, 2026
View at MOH London

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555664423. Listed at 14 retailers as of November 1, 2026, with prices from $6,220 to $11,586, a $5,366 spread on the same certified stone. MOH London lists it at $11,586. 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555664423
Dimensions11.46 × 5.97 × 3.63 mm
L/W Ratio1.92
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Natural
Top View
11.46 mm5.97 mm1.50 ctI / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555664423
Side View
Table 60.0%CrownGirdle: STK-THKPavilionCulet: NDepth 60.8%

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 1
Current: $11,586 USD|Low: $6,823 USD|High: $11,726 USD|Avg: $8,211 USD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 7$6,823 USD
Retailer 12$6,930 USD
Retailer 10$7,207 USD
Retailer 6$7,762 USD
Retailer 8$7,858 USD
Retailer 5$7,859 USD
Retailer 11$8,039 USD
Retailer 4$8,390 USD
Retailer 9$8,477 USD
Retailer 3$8,670 USD
Retailer 2$8,681 USD
MOH London$11,586 USD

41 data points across 12 retailers

14 retailers$6,220 USD to $11,586 USD

A
Cheapest Retailer
-
$6,220 USD
B+
Retailer 2
-
$6,823 USD
View
B+
Retailer 3
-
$6,930 USD
CA$9,625 CAD
View
B+
Retailer 4
-
$7,207 USD
View
B+
Retailer 5
-
$7,762 USD
View
B+
Retailer 6
-
$7,858 USD
View
B+
Retailer 7
-
$7,859 USD
£6,188 GBP
View
B+
Retailer 8
-
$8,039 USD
View
B
Retailer 9
-
$8,390 USD
View
B
Retailer 10
-
$8,390 USD
View
B
Retailer 11
-
$8,477 USD
View
B
Retailer 12
-
$8,670 USD
View
B
Retailer 13
-
$8,681 USD
€8,268 EUR
View
Most Expensive
B
MOH London
D2AC85338 · Nov 1
$11,586 USD
£9,123 GBP
View
13 more retailers have this diamond
Prices start from $6,220 USDSave up to $5,366 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
$6,220 USD