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Marquise|Natural|GIA

1.21ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 2245057364

Certificate GIA 2245057364

Diamond specifications and retailer prices

From $5,293 AUD
As of November 4, 2026
Save $4,194 AUD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $9,488 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 2245057364. Listed at 13 retailers as of November 4, 2026, with prices from $5,293 to $9,488, a $4,194 spread on the same certified stone. Helzberg Diamonds lists it at $9,488. 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 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $9,488 AUD|Low: $5,293 AUD|High: $10,182 AUD|Avg: $6,714 AUD|-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$5,293 AUD
Retailer 4$5,427 AUD
Retailer 8$5,533 AUD
Retailer 7$5,657 AUD
Retailer 3$5,776 AUD
Retailer 5$5,822 AUD
Retailer 6$6,072 AUD
Retailer 9$6,549 AUD
Retailer 12$6,709 AUD
Retailer 13$6,762 AUD
Retailer 2$6,804 AUD
Retailer 11$9,450 AUD
Helzberg Diamonds$9,488 AUD

39 data points across 13 retailers

13 retailers$5,293 AUD to $9,488 AUD

A
Cheapest Retailer
-
$5,293 AUD
A
Retailer 2
-
$5,427 AUD
View
A
Retailer 3
-
$5,533 AUD
View
B+
Retailer 4
-
$5,657 AUD
View
B+
Retailer 5
-
$5,776 AUD
View
Retailer 6
-
$5,822 AUD
View
Price last confirmed 10 days ago
B+
Retailer 7
-
$6,072 AUD
View
B+
Retailer 8
-
$6,549 AUD
View
B+
Retailer 9
-
$6,709 AUD
View
B+
Retailer 10
-
$6,762 AUD
View
B+
Retailer 11
-
$6,804 AUD
View
B
Retailer 12
-
$9,450 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLGLNJMK · Nov 6
$9,488 AUD
$6,519 USD
View
12 more retailers have this diamond
Prices start from $5,293 AUDSave up to $4,194 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
$5,293 AUD