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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 2554704643

Certificate GIA 2554704643

Diamond specifications and retailer prices

From $4,004 USD
As of November 7, 2026
Save $3,528 USD (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,532 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 2554704643. Listed at 14 retailers as of November 4, 2026, with prices from $4,004 to $7,532, a $3,528 spread on the same certified stone. MOH London lists it at $7,532. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554704643
Dimensions10.22 × 5.54 × 3.31 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Needle, Natural
Top View
10.22 mm5.54 mm1.20 ctI / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2554704643
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 59.7%

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 7
Current: $7,532 USD|Low: $3,379 USD|High: $7,563 USD|Avg: $4,700 USD|-0.4%
MOH London
Retailer 2
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Retailer 24
November 7, 2026
Retailer 10$3,379 USD
Retailer 8$3,550 USD
Retailer 14$3,763 USD
Retailer 6$4,004 USD
Retailer 23$4,094 USD
Retailer 3$4,251 USD
Retailer 12$4,261 USD
Retailer 5$4,336 USD
Retailer 2$4,396 USD
Retailer 21$4,408 USD
Retailer 15$4,448 USD
Retailer 11$4,625 USD
Retailer 18$4,640 USD
Retailer 7$4,710 USD
Retailer 9$4,710 USD
Retailer 19$4,714 USD
Retailer 4$4,723 USD
Retailer 20$5,038 USD
Retailer 22$5,084 USD
Retailer 17$5,165 USD
Retailer 16$5,364 USD
Retailer 13$6,013 USD
Retailer 24$6,927 USD
MOH London$7,532 USD

11 data points across 24 retailers

14 retailers$4,004 USD to $7,532 USD

B+
Cheapest Retailer
-
$4,004 USD
B+
Retailer 2
-
$4,094 USD
View
B
Retailer 3
-
$4,251 USD
View
B+
Retailer 4
-
$4,336 USD
View
B+
Retailer 5
-
$4,396 USD
View
B+
Retailer 6
-
$4,408 USD
View
B
Retailer 7
-
$4,640 USD
View
B+
Retailer 8
-
$4,714 USD
View
B
Retailer 9
-
$4,723 USD
View
B
Retailer 10
-
$5,038 USD
View
B
Retailer 11
-
$5,084 USD
View
B
Retailer 12
-
$6,013 USD
View
B
Retailer 13
-
$6,927 USD
View
Most Expensive
B
MOH London
CBAE86CD0 · Nov 4
$7,532 USD
£5,931 GBP
View
13 more retailers have this diamond
Prices start from $4,004 USDSave up to $3,528 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
$4,004 USD