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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 $5,050 CAD
$3,615 USD
As of October 31, 2026
Save $5,545 CAD (52%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $10,595 CAD 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 $5,050 to $10,595, a $5,545 spread on the same certified stone. MOH London lists it at $10,595. 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: $10,595 CAD|Low: $4,375 CAD|High: $10,722 CAD|Avg: $6,549 CAD|-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 1, 2026
Retailer 3$5,050 CAD
Retailer 2$5,250 CAD
Retailer 9$5,412 CAD
Retailer 10$6,026 CAD
Retailer 11$6,125 CAD
Retailer 4$6,209 CAD
Retailer 12$6,310 CAD
Retailer 5$6,615 CAD
Retailer 8$6,706 CAD
Retailer 7$7,065 CAD
Retailer 6$8,177 CAD
MOH London$10,595 CAD

44 data points across 12 retailers

18 retailers$5,050 CAD to $10,595 CAD

B+
Cheapest Retailer
-
$5,050 CAD
$3,615 USD
B
Retailer 2
-
$5,198 CAD
$3,721 USD
View
B+
Retailer 3
-
$5,250 CAD
$3,758 USD
View
B
Retailer 4
-
$5,304 CAD
$3,797 USD
View
B
Retailer 5
-
$5,316 CAD
$3,805 USD
View
B
Retailer 6
-
$5,996 CAD
$4,293 USD
View
Retailer 7
-
$6,026 CAD
$4,314 USD
View
Price last confirmed 7 days ago
Retailer 8
-
$6,125 CAD
$4,385 USD
View
Price last confirmed 11 days ago
B
Retailer 9
-
$6,209 CAD
A$6,838 AUD
View
Retailer 10
-
$6,290 CAD
$4,503 USD
View
Price last confirmed 9 days ago
B
Retailer 11
-
$6,310 CAD
$4,517 USD
View
B
Retailer 12
-
$6,615 CAD
£3,729 GBP
View
Retailer 13
-
$6,706 CAD
A$7,386 AUD
View
Price last confirmed 22 days ago
B
Retailer 14
-
$6,916 CAD
$4,951 USD
View
B
Retailer 15
-
$7,065 CAD
€4,817 EUR
View
B
Retailer 16
-
$8,177 CAD
ZAR 94,567 ZAR
View
Retailer 17
-
$9,625 CAD
$6,890 USD
View
Price last confirmed 8 days ago
Most Expensive
B
MOH London
CBFC25F1D · Nov 1
$10,595 CAD
£5,972 GBP
View
17 more retailers have this diamond
Prices start from $5,050 CADSave up to $5,545 CAD

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
$5,050 CAD