Marquise|Natural|GIA

1.20ct D SI2 Marquise Natural Diamond

EX • D/SI2 • GIA 3555937032

Certificate GIA 3555937032

Diamond specifications and retailer prices

From $3,667 USD
As of November 4, 2026
Save $2,904 USD (44%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $6,571 USD 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 3555937032. Listed at 11 retailers as of November 4, 2026, with prices from $3,667 to $6,571, a $2,904 spread on the same certified stone. Helzberg Diamonds lists it at $6,571. 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
D
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.76°
Pavilion angle40.92°
OriginNatural
Grading LabGIA
CertificateGIA 3555937032
Dimensions10.44 × 5.50 × 3.54 mm
L/W Ratio1.90
Culet sizeNone
Top View
10.44 mm5.50 mm1.20 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3555937032
Side View
Table 57.0%Crown 38.76°Girdle: THN-THKPavilion 40.92°Culet: NoneDepth 64.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $6,571 USD|Low: $3,667 USD|High: $6,981 USD|Avg: $4,722 USD|-5.9%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 7$3,667 USD
Retailer 6$3,698 USD
Retailer 5$3,756 USD
Retailer 8$3,919 USD
Retailer 11$4,003 USD
Retailer 4$4,206 USD
Retailer 9$4,645 USD
Retailer 10$4,680 USD
Retailer 2$4,714 USD
Retailer 3$6,565 USD
Helzberg Diamonds$6,571 USD

42 data points across 11 retailers

11 retailers$3,667 USD to $6,571 USD

A
Cheapest Retailer
-
$3,667 USD
A
Retailer 2
-
$3,698 USD
View
A
Retailer 3
-
$3,756 USD
View
A
Retailer 4
-
$3,919 USD
View
A
Retailer 5
-
$4,003 USD
View
A
Retailer 6
-
$4,206 USD
View
B+
Retailer 7
-
$4,645 USD
View
B+
Retailer 8
-
$4,680 USD
View
B+
Retailer 9
-
$4,714 USD
View
B
Retailer 10
-
$6,565 USD
View
Most Expensive
B
Helzberg Diamonds
XZRJLLLPJNGJI · Nov 6
$6,571 USD
View
10 more retailers have this diamond
Prices start from $3,667 USDSave up to $2,904 USD

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.

A
1.20ct Marquise
$3,667 USD