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Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 7551009950

Certificate GIA 7551009950

Diamond specifications and retailer prices

From €3,148 EUR
As of November 6, 2026
Save €3,627 EUR (54%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €6,775 EUR 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 J 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 7551009950. Listed at 20 retailers as of November 4, 2026, with prices from €3,148 to €6,775, a €3,627 spread on the same certified stone. MOH London lists it at €6,775. 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
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7551009950
Dimensions10.45 × 5.51 × 3.48 mm
L/W Ratio1.90
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather, Needle
Top View
10.45 mm5.51 mm1.20 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 7551009950
Side View
Table 61.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.1%

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 6
Current: €6,775 EUR|Low: €3,148 EUR|High: €6,875 EUR|Avg: €4,475 EUR|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9€3,148 EUR
Retailer 5€3,366 EUR
Retailer 12€3,470 EUR
Retailer 3€3,864 EUR
Retailer 10€3,927 EUR
Retailer 4€4,046 EUR
Retailer 7€4,175 EUR
Retailer 11€4,299 EUR
Retailer 6€4,528 EUR
Retailer 2€4,587 EUR
Retailer 8€5,204 EUR
MOH London€6,775 EUR

44 data points across 12 retailers

20 retailers€3,148 EUR to €6,775 EUR

B+
Cheapest Retailer
-
€3,148 EUR
B+
Retailer 2
-
€3,238 EUR
View
B
Retailer 3
-
€3,333 EUR
View
B+
Retailer 4
-
€3,366 EUR
View
B
Retailer 5
-
€3,401 EUR
View
B
Retailer 6
-
€3,408 EUR
View
B
Retailer 7
-
€3,844 EUR
View
Retailer 8
-
€3,864 EUR
View
Price last confirmed 13 days ago
B
Retailer 9
-
€3,927 EUR
View
B
Retailer 10
-
€3,980 EUR
View
Retailer 11
-
€4,033 EUR
View
Price last confirmed 15 days ago
B
Retailer 12
-
€4,046 EUR
View
B
Retailer 13
-
€4,175 EUR
View
Retailer 14
-
€4,299 EUR
View
Price last confirmed 29 days ago
B
Retailer 15
-
€4,434 EUR
View
B
Retailer 16
-
€4,528 EUR
View
B
Retailer 17
-
€4,587 EUR
View
B
Retailer 18
-
€5,204 EUR
View
B
Retailer 19
-
€6,171 EUR
View
Most Expensive
B
MOH London
CBFC25F1D · Nov 4
€6,775 EUR
£5,956 GBP
View
19 more retailers have this diamond
Prices start from €3,148 EURSave up to €3,627 EUR

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
€3,148 EUR