Marquise|Natural|GIA

1.21ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 2245057364

Certificate GIA 2245057364

Diamond specifications and retailer prices

From $3,637 USD
As of November 4, 2026
Save $2,882 USD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,519 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2245057364. Listed at 13 retailers as of November 4, 2026, with prices from $3,637 to $6,519, a $2,882 spread on the same certified stone. Helzberg Diamonds lists it at $6,519. 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.96°
Pavilion angle37.63°
OriginNatural
Grading LabGIA
CertificateGIA 2245057364
Dimensions10.52 × 5.56 × 3.39 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.52 mm5.56 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245057364
Side View
Table 58.0%Crown 39.96°Girdle: STK-THKPavilion 37.63°Culet: NoneDepth 61.0%

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: $6,519 USD|Low: $3,637 USD|High: $6,996 USD|Avg: $4,613 USD|-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 10$3,637 USD
Retailer 4$3,729 USD
Retailer 8$3,802 USD
Retailer 7$3,887 USD
Retailer 3$3,969 USD
Retailer 5$4,000 USD
Retailer 6$4,172 USD
Retailer 9$4,500 USD
Retailer 12$4,610 USD
Retailer 13$4,646 USD
Retailer 2$4,675 USD
Retailer 11$6,493 USD
Helzberg Diamonds$6,519 USD

39 data points across 13 retailers

13 retailers$3,637 USD to $6,519 USD

A
Cheapest Retailer
-
$3,637 USD
A
Retailer 2
-
$3,729 USD
View
A
Retailer 3
-
$3,802 USD
View
B+
Retailer 4
-
$3,887 USD
View
B+
Retailer 5
-
$3,969 USD
View
Retailer 6
-
$4,000 USD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$4,172 USD
View
B+
Retailer 8
-
$4,500 USD
View
B+
Retailer 9
-
$4,610 USD
View
B+
Retailer 10
-
$4,646 USD
View
B+
Retailer 11
-
$4,675 USD
View
B
Retailer 12
-
$6,493 USD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLGLNJMK · Nov 6
$6,519 USD
View
12 more retailers have this diamond
Prices start from $3,637 USDSave up to $2,882 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
$3,637 USD