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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 $3,590 USD
As of November 5, 2026
Save $4,119 USD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,709 USD 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 20 retailers as of November 4, 2026, with prices from $3,590 to $7,709, a $4,119 spread on the same certified stone. MOH London lists it at $7,709. 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
Color
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: $7,709 USD|Low: $3,590 USD|High: $8,221 USD|Avg: $4,923 USD|-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
November 6, 2026
Retailer 16$3,590 USD
Retailer 6$3,792 USD
Retailer 2$3,830 USD
Retailer 4$3,868 USD
Retailer 7$3,878 USD
Retailer 13$4,013 USD
Retailer 5$4,057 USD
Retailer 11$4,086 USD
Retailer 3$4,371 USD
Retailer 17$4,469 USD
Retailer 9$4,614 USD
Retailer 15$4,750 USD
Retailer 12$4,772 USD
Retailer 8$4,950 USD
Retailer 18$4,950 USD
Retailer 19$5,110 USD
Retailer 14$5,153 USD
Retailer 10$7,022 USD
MOH London$7,709 USD

24 data points across 19 retailers

20 retailers$3,590 USD to $7,709 USD

A
Cheapest Retailer
-
$3,590 USD
B+
Retailer 2
-
$3,730 USD
View
B+
Retailer 3
-
$3,792 USD
View
B+
Retailer 4
-
$3,830 USD
View
B+
Retailer 5
-
$3,868 USD
View
B+
Retailer 6
-
$3,878 USD
View
B+
Retailer 7
-
$4,012 USD
View
B+
Retailer 8
-
$4,013 USD
View
B+
Retailer 9
-
$4,057 USD
View
Final sale: no returns
B+
Retailer 10
-
$4,371 USD
View
B+
Retailer 11
-
$4,469 USD
View
B
Retailer 12
-
$4,614 USD
View
B+
Retailer 13
-
$4,750 USD
View
B+
Retailer 14
-
$4,772 USD
View
B+
Retailer 15
-
$4,950 USD
View
B+
Retailer 16
-
$4,950 USD
View
B
Retailer 17
-
$5,110 USD
View
B+
Retailer 18
-
$5,153 USD
View
B
Retailer 19
-
$7,022 USD
View
Most Expensive
B
MOH London
DF1557164 · Nov 4
$7,709 USD
£6,070 GBP
View
19 more retailers have this diamond
Prices start from $3,590 USDSave up to $4,119 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
1.20ct Marquise
$3,590 USD