Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 5241054637

Certificate GIA 5241054637

Diamond specifications and retailer prices

From $5,169 CAD
As of November 4, 2026
Save $4,093 CAD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $9,262 CAD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 5241054637. Listed at 14 retailers as of November 4, 2026, with prices from $5,169 to $9,262, a $4,093 spread on the same certified stone. Helzberg Diamonds lists it at $9,262. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
I
Color
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.62°
Pavilion angle40.02°
OriginNatural
Grading LabGIA
CertificateGIA 5241054637
Dimensions10.10 × 5.46 × 3.58 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.10 mm5.46 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241054637
Side View
Table 59.0%Crown 40.62°Girdle: STK-VTKPavilion 40.02°Culet: NDepth 65.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $9,262 CAD|Low: $5,169 CAD|High: $9,981 CAD|Avg: $6,675 CAD|-6.0%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 10$5,169 CAD
Retailer 12$5,251 CAD
Retailer 6$5,406 CAD
Retailer 9$5,517 CAD
Retailer 8$5,525 CAD
Retailer 4$5,645 CAD
Retailer 5$5,683 CAD
Retailer 7$5,929 CAD
Retailer 14$6,549 CAD
Retailer 3$6,597 CAD
Retailer 2$6,648 CAD
Retailer 11$8,720 CAD
Retailer 13$9,202 CAD
Helzberg Diamonds$9,262 CAD

35 data points across 14 retailers

14 retailers$5,169 CAD to $9,262 CAD

B+
Cheapest Retailer
-
$5,169 CAD
B+
Retailer 2
-
$5,251 CAD
View
B+
Retailer 3
-
$5,406 CAD
View
B+
Retailer 4
-
$5,517 CAD
View
B+
Retailer 5
-
$5,525 CAD
View
B+
Retailer 6
-
$5,645 CAD
View
B+
Retailer 7
-
$5,683 CAD
View
B
Retailer 8
-
$5,929 CAD
View
B
Retailer 9
-
$6,549 CAD
View
B
Retailer 10
-
$6,597 CAD
View
B
Retailer 11
-
$6,648 CAD
View
B
Retailer 12
-
$8,720 CAD
View
B
Retailer 13
-
$9,202 CAD
View
Most Expensive
B
Helzberg Diamonds
XZRLIKHGLKMJN · Nov 6
$9,262 CAD
$6,585 USD
View
13 more retailers have this diamond
Prices start from $5,169 CADSave up to $4,093 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
$5,169 CAD