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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 €3,075 EUR
As of November 4, 2026
Save €2,435 EUR (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: €5,510 EUR 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 €3,075 to €5,510, a €2,435 spread on the same certified stone. Helzberg Diamonds lists it at €5,510. 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
Colour
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: €5,510 EUR|Low: €3,075 EUR|High: €5,915 EUR|Avg: €4,066 EUR|-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 7, 2026
Retailer 9€3,075 EUR
Retailer 11€3,125 EUR
Retailer 7€3,150 EUR
Retailer 10€3,286 EUR
Retailer 4€3,357 EUR
Retailer 2€3,550 EUR
Retailer 8€3,882 EUR
Retailer 13€3,910 EUR
Retailer 3€3,951 EUR
Retailer 6€3,953 EUR
Retailer 12€5,187 EUR
Retailer 5€5,483 EUR
Helzberg Diamonds€5,510 EUR

33 data points across 13 retailers

13 retailers€3,075 EUR to €5,510 EUR

B+
Cheapest Retailer
-
€3,075 EUR
B+
Retailer 2
-
€3,125 EUR
View
B+
Retailer 3
-
€3,150 EUR
View
B+
Retailer 4
-
€3,286 EUR
View
B+
Retailer 5
-
€3,357 EUR
View
B
Retailer 6
-
€3,550 EUR
View
B
Retailer 7
-
€3,882 EUR
View
B
Retailer 8
-
€3,910 EUR
View
B
Retailer 9
-
€3,951 EUR
View
B
Retailer 10
-
€3,953 EUR
View
B
Retailer 11
-
€5,187 EUR
View
B
Retailer 12
-
€5,483 EUR
View
Most Expensive
B
Helzberg Diamonds
XZRLLLJOJHNLI · Nov 6
€5,510 EUR
$6,152 USD
View
12 more retailers have this diamond
Prices start from €3,075 EURSave up to €2,435 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
€3,075 EUR