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Marquise|Natural|GIA

1.50ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 5553439824

Certificate GIA 5553439824

Diamond specifications and retailer prices

From $10,759 AUD
$7,540 USD
As of November 1, 2026
Save $7,934 AUD (42%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $18,692 AUD at MOH London · As of November 2, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5553439824. Listed at 15 retailers as of November 1, 2026, with prices from $10,759 to $18,692, a $7,934 spread on the same certified stone. MOH London lists it at $18,692. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 5553439824
Dimensions11.24 × 5.92 × 3.77 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather, Indented Natural, Cavity, Natural, Extra Facet
Top View
11.24 mm5.92 mm1.50 ctI / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceMedium
CertificateGIA 5553439824
Side View
Table 61.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: $18,692 AUD|Low: $10,759 AUD|High: $18,919 AUD|Avg: $13,811 AUD|-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
Retailer 13
Retailer 14
November 2, 2026
Retailer 3$10,759 AUD
Retailer 13$11,710 AUD
Retailer 9$11,791 AUD
Retailer 10$12,465 AUD
Retailer 7$13,099 AUD
Retailer 8$13,424 AUD
Retailer 14$13,476 AUD
Retailer 11$13,904 AUD
Retailer 4$14,298 AUD
Retailer 6$14,298 AUD
Retailer 12$14,661 AUD
Retailer 5$14,768 AUD
Retailer 2$15,015 AUD
MOH London$18,692 AUD

31 data points across 14 retailers

15 retailers$10,759 AUD to $18,692 AUD

B+
Cheapest Retailer
-
$10,759 AUD
$7,540 USD
B+
Retailer 2
-
$11,710 AUD
$8,207 USD
View
B+
Retailer 3
-
$11,791 AUD
CA$11,477 CAD
View
B
Retailer 4
-
$12,465 AUD
$8,736 USD
View
B
Retailer 5
-
$13,099 AUD
£7,228 GBP
View
B
Retailer 6
-
$13,314 AUD
CA$12,960 CAD
View
B
Retailer 7
-
$13,424 AUD
$9,408 USD
View
B
Retailer 8
-
$13,476 AUD
$9,444 USD
View
B
Retailer 9
-
$13,904 AUD
$9,744 USD
View
B
Retailer 10
-
$14,298 AUD
$10,020 USD
View
B
Retailer 11
-
$14,298 AUD
$10,020 USD
View
B
Retailer 12
-
$14,661 AUD
$10,275 USD
View
B
Retailer 13
-
$14,768 AUD
$10,350 USD
View
B
Retailer 14
-
$15,015 AUD
€10,022 EUR
View
Most Expensive
B
MOH London
E5DF95E55 · Nov 2
$18,692 AUD
£10,315 GBP
View
14 more retailers have this diamond
Prices start from $10,759 AUDSave up to $7,934 AUD

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.

B+
1.50ct Marquise
$10,759 AUD