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Marquise|Natural|GIA

1.20ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 6545918778

Certificate GIA 6545918778

Diamond specifications and retailer prices

From $5,225 AUD
As of November 5, 2026
Save $5,995 AUD (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,220 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545918778. Listed at 21 retailers as of November 4, 2026, with prices from $5,225 to $11,220, a $5,995 spread on the same certified stone. MOH London lists it at $11,220. 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

1.20
Carat
F
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6545918778
Dimensions10.36 × 5.54 × 3.53 mm
L/W Ratio1.87
Top View
10.36 mm5.54 mm1.20 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6545918778
Side View
Table 63.0%CrownGirdle: THK-XTKPavilionCulet: NoneDepth 63.8%

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 5
Current: $11,220 AUD|Low: $5,225 AUD|High: $11,964 AUD|Avg: $7,153 AUD|-5.2%
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
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
November 6, 2026
Retailer 18$5,225 AUD
Retailer 7$5,519 AUD
Retailer 13$5,574 AUD
Retailer 5$5,629 AUD
Retailer 8$5,644 AUD
Retailer 15$5,841 AUD
Retailer 6$5,905 AUD
Retailer 12$5,947 AUD
Retailer 4$6,362 AUD
Retailer 19$6,504 AUD
Retailer 10$6,715 AUD
Retailer 17$6,913 AUD
Retailer 14$6,945 AUD
Retailer 9$7,204 AUD
Retailer 20$7,204 AUD
Retailer 3$7,437 AUD
Retailer 16$7,500 AUD
Retailer 2$7,626 AUD
Retailer 11$10,220 AUD
MOH London$11,220 AUD

23 data points across 20 retailers

21 retailers$5,225 AUD to $11,220 AUD

A
Cheapest Retailer
-
$5,225 AUD
B+
Retailer 2
-
$5,429 AUD
View
B+
Retailer 3
-
$5,519 AUD
View
B+
Retailer 4
-
$5,574 AUD
View
B+
Retailer 5
-
$5,629 AUD
View
B+
Retailer 6
-
$5,644 AUD
View
B+
Retailer 7
-
$5,839 AUD
View
B+
Retailer 8
-
$5,841 AUD
View
B+
Retailer 9
-
$5,905 AUD
View
Final sale: no returns
B+
Retailer 10
-
$6,362 AUD
View
B+
Retailer 11
-
$6,504 AUD
View
B
Retailer 12
-
$6,715 AUD
View
B+
Retailer 13
-
$6,913 AUD
View
B+
Retailer 14
-
$6,945 AUD
View
B+
Retailer 15
-
$7,204 AUD
View
B+
Retailer 16
-
$7,204 AUD
View
B
Retailer 17
-
$7,437 AUD
View
B+
Retailer 18
-
$7,500 AUD
View
Retailer 19
-
$7,626 AUD
View
B
Retailer 20
-
$10,220 AUD
View
Most Expensive
B
MOH London
DF1557164 · Nov 4
$11,220 AUD
£6,070 GBP
View
20 more retailers have this diamond
Prices start from $5,225 AUDSave up to $5,995 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.

A
1.20ct Marquise
$5,225 AUD