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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 5553831752

Certificate GIA 5553831752

Diamond specifications and retailer prices

From $4,829 CAD
As of November 4, 2026
Save $3,825 CAD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,653 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 5553831752. Listed at 13 retailers as of November 4, 2026, with prices from $4,829 to $8,653, a $3,825 spread on the same certified stone. Helzberg Diamonds lists it at $8,653. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.81°
Pavilion angle40.44°
OriginNatural
Grading LabGIA
CertificateGIA 5553831752
Dimensions10.07 × 5.44 × 3.66 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.07 mm5.44 mm1.20 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553831752
Side View
Table 60.0%Crown 42.81°Girdle: MED-VTKPavilion 40.44°Culet: NoneDepth 67.3%

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 4
Current: $8,653 CAD|Low: $4,829 CAD|High: $9,289 CAD|Avg: $6,391 CAD|-6.8%
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
November 6, 2026
Retailer 9$4,829 CAD
Retailer 11$4,908 CAD
Retailer 7$4,947 CAD
Retailer 10$5,161 CAD
Retailer 4$5,272 CAD
Retailer 6$5,542 CAD
Retailer 8$6,096 CAD
Retailer 13$6,140 CAD
Retailer 3$6,205 CAD
Retailer 2$6,207 CAD
Retailer 12$8,146 CAD
Retailer 5$8,611 CAD
Helzberg Diamonds$8,653 CAD

32 data points across 13 retailers

13 retailers$4,829 CAD to $8,653 CAD

B+
Cheapest Retailer
-
$4,829 CAD
B+
Retailer 2
-
$4,908 CAD
View
B+
Retailer 3
-
$4,947 CAD
View
B+
Retailer 4
-
$5,161 CAD
View
B+
Retailer 5
-
$5,272 CAD
View
B
Retailer 6
-
$5,542 CAD
View
B
Retailer 7
-
$6,096 CAD
View
B
Retailer 8
-
$6,140 CAD
View
B
Retailer 9
-
$6,205 CAD
View
B
Retailer 10
-
$6,207 CAD
View
B
Retailer 11
-
$8,146 CAD
View
B
Retailer 12
-
$8,611 CAD
View
Most Expensive
B
Helzberg Diamonds
XZRLLLJOJHNLI · Nov 6
$8,653 CAD
$6,152 USD
View
12 more retailers have this diamond
Prices start from $4,829 CADSave up to $3,825 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
$4,829 CAD