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Marquise|Natural|GIA

1.21ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 2245000215

Certificate GIA 2245000215

Diamond specifications and retailer prices

From $5,525 AUD
As of November 4, 2026
Save $4,375 AUD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $9,900 AUD 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 2245000215. Listed at 13 retailers as of November 4, 2026, with prices from $5,525 to $9,900, a $4,375 spread on the same certified stone. Helzberg Diamonds lists it at $9,900. 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.01°
Pavilion angle37.63°
OriginNatural
Grading LabGIA
CertificateGIA 2245000215
Dimensions10.59 × 5.59 × 3.39 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.59 mm5.59 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245000215
Side View
Table 58.0%Crown 40.01°Girdle: MED-THKPavilion 37.63°Culet: NoneDepth 60.7%

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: $9,900 AUD|Low: $5,525 AUD|High: $10,309 AUD|Avg: $7,093 AUD|-4.0%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8$5,525 AUD
Retailer 6$5,659 AUD
Retailer 4$5,662 AUD
Retailer 9$5,852 AUD
Retailer 12$6,031 AUD
Retailer 7$6,373 AUD
Retailer 10$6,986 AUD
Retailer 11$7,028 AUD
Retailer 5$7,102 AUD
Retailer 2$7,664 AUD
Retailer 3$9,852 AUD
Helzberg Diamonds$9,900 AUD

35 data points across 12 retailers

13 retailers$5,525 AUD to $9,900 AUD

A
Cheapest Retailer
-
$5,525 AUD
A
Retailer 2
-
$5,659 AUD
View
A
Retailer 3
-
$5,662 AUD
View
B+
Retailer 4
-
$5,852 AUD
View
B+
Retailer 5
-
$6,031 AUD
View
B+
Retailer 6
-
$6,373 AUD
View
B+
Retailer 7
-
$6,986 AUD
View
B+
Retailer 8
-
$7,028 AUD
View
B+
Retailer 9
-
$7,102 AUD
View
B+
Retailer 10
-
$7,370 AUD
View
B+
Retailer 11
-
$7,664 AUD
View
B
Retailer 12
-
$9,852 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLGGGIHL · Nov 6
$9,900 AUD
$6,802 USD
View
12 more retailers have this diamond
Prices start from $5,525 AUDSave up to $4,375 AUD

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
$5,525 AUD