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Marquise|Natural|GIA

1.20ct G SI2 Marquise Natural Diamond

GD • G/SI2 • GIA 6551200456

Certificate GIA 6551200456

Diamond specifications and retailer prices

From $3,307 USD
As of November 6, 2026
Save $3,678 USD (53%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $6,985 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551200456. Listed at 21 retailers as of November 4, 2026, with prices from $3,307 to $6,985, a $3,678 spread on the same certified stone. MOH London lists it at $6,985. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
G
Color
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle43.77°
Pavilion angle40.27°
OriginNatural
Grading LabGIA
CertificateGIA 6551200456
Dimensions9.73 × 5.34 × 3.54 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.73 mm5.34 mm1.20 ctG / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6551200456
Side View
Table 64.0%Crown 43.77°Girdle: MED-VTKPavilion 40.27°Culet: NoneDepth 66.2%

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 6
Current: $6,985 USD|Low: $2,362 USD|High: $6,985 USD|Avg: $3,492 USD
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 12$2,362 USD
Retailer 11$3,165 USD
Retailer 15$3,307 USD
Retailer 3$3,382 USD
Retailer 10$3,389 USD
Retailer 9$3,400 USD
Retailer 16$3,465 USD
Retailer 6$3,469 USD
Retailer 18$3,505 USD
Retailer 19$3,677 USD
Retailer 13$3,974 USD
Retailer 7$4,213 USD
Retailer 2$4,324 USD
Retailer 17$4,454 USD
Retailer 4$4,490 USD
Retailer 5$4,490 USD
Retailer 8$4,640 USD
Retailer 14$4,668 USD
Retailer 20$6,359 USD
MOH London$6,985 USD

33 data points across 20 retailers

21 retailers$3,307 USD to $6,985 USD

Retailer 1
-
$3,165 USD
Price last confirmed 16 days ago
A
Retailer 2
-
$3,307 USD
View
B+
Retailer 3
-
$3,382 USD
View
Retailer 4
-
$3,389 USD
View
Price last confirmed 17 days ago
Retailer 5
-
$3,400 USD
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$3,465 USD
View
B+
Retailer 7
-
$3,469 USD
View
B+
Retailer 8
-
$3,505 USD
View
B+
Retailer 9
-
$3,645 USD
View
B+
Retailer 10
-
$3,677 USD
View
Final sale: no returns
B+
Retailer 11
-
$3,803 USD
View
B+
Retailer 12
-
$3,974 USD
View
B
Retailer 13
-
$4,213 USD
View
B
Retailer 14
-
$4,324 USD
View
B
Retailer 15
-
$4,454 USD
View
B
Retailer 16
-
$4,490 USD
View
B
Retailer 17
-
$4,490 USD
View
B
Retailer 18
-
$4,640 USD
View
B
Retailer 19
-
$4,668 USD
View
C
Retailer 20
-
$6,359 USD
View
Most Expensive
C
MOH London
FEED6857D · Nov 4
$6,985 USD
£5,500 GBP
View
20 more retailers have this diamond
Prices start from $3,307 USDSave up to $3,678 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
$3,307 USD