CaratHunter
Plans
Marquise|Natural|GIA

1.20ct J SI1 Marquise Natural Diamond

ID • J/SI1 • GIA 7551009950

Certificate GIA 7551009950

Diamond specifications and retailer prices

From €3,236 EUR
$3,615 USD
As of October 31, 2026
Save €3,553 EUR (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: €6,789 EUR at MOH London · As of November 1, 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 18 retailers as of October 31, 2026, with prices from €3,236 to €6,789, a €3,553 spread on the same certified stone. MOH London lists it at €6,789. 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
Color
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: Oct 31
Current: €6,789 EUR|Low: €2,803 EUR|High: €6,871 EUR|Avg: €4,201 EUR|-0.1%
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 2, 2026
Retailer 3€3,236 EUR
Retailer 6€3,364 EUR
Retailer 9€3,468 EUR
Retailer 10€3,861 EUR
Retailer 11€3,925 EUR
Retailer 4€3,978 EUR
Retailer 12€4,043 EUR
Retailer 5€4,239 EUR
Retailer 8€4,297 EUR
Retailer 2€4,546 EUR
Retailer 7€5,240 EUR
MOH London€6,789 EUR

44 data points across 12 retailers

18 retailers€3,236 EUR to €6,789 EUR

B+
Cheapest Retailer
-
€3,236 EUR
$3,615 USD
B
Retailer 2
-
€3,331 EUR
$3,721 USD
View
B+
Retailer 3
-
€3,364 EUR
$3,758 USD
View
B
Retailer 4
-
€3,399 EUR
$3,797 USD
View
B
Retailer 5
-
€3,406 EUR
$3,805 USD
View
B
Retailer 6
-
€3,842 EUR
$4,293 USD
View
Retailer 7
-
€3,861 EUR
$4,314 USD
View
Price last confirmed 8 days ago
Retailer 8
-
€3,925 EUR
$4,385 USD
View
Price last confirmed 11 days ago
B
Retailer 9
-
€3,978 EUR
A$6,838 AUD
View
Retailer 10
-
€4,031 EUR
$4,503 USD
View
Price last confirmed 10 days ago
B
Retailer 11
-
€4,043 EUR
$4,517 USD
View
B
Retailer 12
-
€4,239 EUR
£3,729 GBP
View
Retailer 13
-
€4,297 EUR
A$7,386 AUD
View
Price last confirmed 23 days ago
B
Retailer 14
-
€4,432 EUR
$4,951 USD
View
B
Retailer 15
-
€4,546 EUR
View
B
Retailer 16
-
€5,240 EUR
ZAR 94,567 ZAR
View
Retailer 17
-
€6,168 EUR
$6,890 USD
View
Price last confirmed 9 days ago
Most Expensive
B
MOH London
CBFC25F1D · Nov 1
€6,789 EUR
£5,972 GBP
View
17 more retailers have this diamond
Prices start from €3,236 EURSave up to €3,553 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
€3,236 EUR