Marquise|Natural|GIA

1.21ct F SI2 Marquise Natural Diamond

GD • F/SI2 • GIA 1555561523

Certificate GIA 1555561523

Diamond specifications and retailer prices

From $3,206 USD
As of November 4, 2026
Save $2,890 USD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,096 USD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1555561523. Listed at 12 retailers as of November 4, 2026, with prices from $3,206 to $6,096, a $2,890 spread on the same certified stone. Helzberg Diamonds lists it at $6,096. 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

1.21
Carat
F
Color
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.64°
Pavilion angle40.64°
OriginNatural
Grading LabGIA
CertificateGIA 1555561523
Dimensions9.96 × 5.47 × 3.68 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.96 mm5.47 mm1.21 ctF / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555561523
Side View
Table 59.0%Crown 43.64°Girdle: STK-VTKPavilion 40.64°Culet: NoneDepth 67.3%

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: $6,096 USD|Low: $3,206 USD|High: $6,227 USD|Avg: $4,279 USD|-2.1%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 7$3,206 USD
Retailer 6$3,351 USD
Retailer 3$3,496 USD
Retailer 2$3,702 USD
Retailer 4$3,858 USD
Retailer 11$3,862 USD
Retailer 9$4,090 USD
Retailer 10$4,149 USD
Retailer 5$4,264 USD
Retailer 8$5,747 USD
Helzberg Diamonds$6,096 USD

41 data points across 11 retailers

12 retailers$3,206 USD to $6,096 USD

A
Cheapest Retailer
-
$3,206 USD
A
Retailer 2
-
$3,351 USD
View
B+
Retailer 3
-
$3,496 USD
View
B+
Retailer 4
-
$3,702 USD
View
B+
Retailer 5
-
$3,858 USD
View
B+
Retailer 6
-
$3,862 USD
View
B+
Retailer 7
-
$4,090 USD
View
B+
Retailer 8
-
$4,149 USD
View
B+
Retailer 9
-
$4,264 USD
View
B
Retailer 10
-
$4,499 USD
View
B
Retailer 11
-
$5,747 USD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLLLMHLIJ · Nov 6
$6,096 USD
View
11 more retailers have this diamond
Prices start from $3,206 USDSave up to $2,890 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
1.21ct Marquise
$3,206 USD