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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

EX • I/SI1 • GIA 5241088647

Certificate GIA 5241088647

Diamond specifications and retailer prices

From $4,329 USD
As of November 5, 2026
Save $4,373 USD (50%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,702 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 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 5241088647. Listed at 13 retailers as of November 4, 2026, with prices from $4,329 to $8,702, a $4,373 spread on the same certified stone. MOH London lists it at $8,702. 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
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241088647
Dimensions10.42 × 5.34 × 3.39 mm
L/W Ratio1.95
Girdle conditionFaceted
Culet sizeNone
Top View
10.42 mm5.34 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241088647
Side View
Table 61.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.5%

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 5
Current: $8,702 USD|Low: $4,329 USD|High: $8,702 USD|Avg: $5,620 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
November 6, 2026
Retailer 11$4,329 USD
Retailer 12$4,619 USD
Retailer 10$4,670 USD
Retailer 9$5,223 USD
Retailer 13$5,253 USD
Retailer 7$5,292 USD
Retailer 2$5,314 USD
Retailer 6$5,320 USD
Retailer 3$5,560 USD
Retailer 4$5,560 USD
Retailer 5$5,750 USD
Retailer 8$6,684 USD
MOH London$8,702 USD

3 data points across 13 retailers

13 retailers$4,329 USD to $8,702 USD

B+
Cheapest Retailer
-
$4,329 USD
B+
Retailer 2
-
$4,619 USD
View
B
Retailer 3
-
$4,670 USD
View
B
Retailer 4
-
$5,223 USD
View
B
Retailer 5
-
$5,253 USD
View
B
Retailer 6
-
$5,292 USD
View
B
Retailer 7
-
$5,314 USD
View
B
Retailer 8
-
$5,320 USD
View
B
Retailer 9
-
$5,560 USD
View
B
Retailer 10
-
$5,560 USD
View
B
Retailer 11
-
$5,750 USD
View
B
Retailer 12
-
$6,684 USD
View
Most Expensive
B
MOH London
BE1C044CB · Nov 4
$8,702 USD
£6,852 GBP
View
12 more retailers have this diamond
Prices start from $4,329 USDSave up to $4,373 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.

B+
1.20ct Marquise
$4,329 USD