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Marquise|Natural|GIA

1.50ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 2554551416

Certificate GIA 2554551416

Diamond specifications and retailer prices

From $13,504 AUD
$9,464 USD
As of November 2, 2026
Save $10,119 AUD (43%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $23,623 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 G 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 2554551416. Listed at 15 retailers as of November 2, 2026, with prices from $13,504 to $23,623, a $10,119 spread on the same certified stone. MOH London lists it at $23,623. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2554551416
Dimensions11.26 × 5.93 × 3.75 mm
L/W Ratio1.90
Key to symbols
Feather, Crystal, Cloud, Needle, Natural
Top View
11.26 mm5.93 mm1.50 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2554551416
Side View
Table 59.0%CrownGirdle: STK-STKPavilionCulet: NoneDepth 63.2%

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 2
Current: $23,623 AUD|Low: $13,329 AUD|High: $23,908 AUD|Avg: $16,772 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
November 2, 2026
Retailer 7$13,504 AUD
Retailer 4$14,165 AUD
Retailer 10$14,172 AUD
Retailer 9$14,603 AUD
Retailer 5$15,125 AUD
Retailer 2$16,372 AUD
Retailer 8$17,652 AUD
Retailer 6$17,836 AUD
Retailer 11$17,836 AUD
Retailer 3$18,436 AUD
MOH London$23,623 AUD

40 data points across 11 retailers

15 retailers$13,504 AUD to $23,623 AUD

B+
Cheapest Retailer
-
$13,504 AUD
$9,464 USD
B+
Retailer 2
-
$14,165 AUD
$9,927 USD
View
B+
Retailer 3
-
$14,172 AUD
$9,932 USD
View
B+
Retailer 4
-
$14,347 AUD
View
B+
Retailer 5
-
$14,603 AUD
CA$14,214 CAD
View
B
Retailer 6
-
$15,125 AUD
$10,600 USD
View
Final sale: no returns
B+
Retailer 7
-
$16,372 AUD
£9,035 GBP
View
Retailer 8
-
$16,387 AUD
$11,484 USD
View
Price last confirmed 43 days ago
B
Retailer 9
-
$17,652 AUD
$12,371 USD
View
B
Retailer 10
-
$17,836 AUD
$12,500 USD
View
B
Retailer 11
-
$17,836 AUD
$12,500 USD
View
B
Retailer 12
-
$18,436 AUD
$12,920 USD
View
Retailer 13
-
$18,908 AUD
$13,251 USD
View
Price last confirmed 44 days ago
Retailer 14
-
$18,908 AUD
$13,251 USD
View
Price last confirmed 48 days ago
Most Expensive
B
MOH London
C3DA0E18E · Nov 2
$23,623 AUD
£13,036 GBP
View
14 more retailers have this diamond
Prices start from $13,504 AUDSave up to $10,119 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
$13,504 AUD