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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 $11,055 NZD
$6,220 USD
As of November 1, 2026
Save $9,537 NZD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $20,592 NZD 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 $11,055 to $20,592, a $9,537 spread on the same certified stone. MOH London lists it at $20,592. 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
Colour
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: $20,592 NZD|Low: $12,127 NZD|High: $20,840 NZD|Avg: $14,593 NZD|-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$12,127 NZD
Retailer 12$12,317 NZD
Retailer 10$12,809 NZD
Retailer 6$13,795 NZD
Retailer 8$13,966 NZD
Retailer 5$13,968 NZD
Retailer 11$14,288 NZD
Retailer 4$14,912 NZD
Retailer 9$15,066 NZD
Retailer 3$15,409 NZD
Retailer 2$15,429 NZD
MOH London$20,592 NZD

41 data points across 12 retailers

14 retailers$11,055 NZD to $20,592 NZD

A
Cheapest Retailer
-
$11,055 NZD
$6,220 USD
B+
Retailer 2
-
$12,127 NZD
$6,823 USD
View
B+
Retailer 3
-
$12,317 NZD
CA$9,625 CAD
View
B+
Retailer 4
-
$12,809 NZD
$7,207 USD
View
B+
Retailer 5
-
$13,795 NZD
$7,762 USD
View
B+
Retailer 6
-
$13,966 NZD
$7,858 USD
View
B+
Retailer 7
-
$13,968 NZD
£6,188 GBP
View
B+
Retailer 8
-
$14,288 NZD
$8,039 USD
View
B
Retailer 9
-
$14,912 NZD
$8,390 USD
View
B
Retailer 10
-
$14,912 NZD
$8,390 USD
View
B
Retailer 11
-
$15,066 NZD
$8,477 USD
View
B
Retailer 12
-
$15,409 NZD
$8,670 USD
View
B
Retailer 13
-
$15,429 NZD
€8,268 EUR
View
Most Expensive
B
MOH London
D2AC85338 · Nov 1
$20,592 NZD
£9,123 GBP
View
13 more retailers have this diamond
Prices start from $11,055 NZDSave up to $9,537 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 Marquise
$11,055 NZD