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Marquise|Natural|GIA

1.21ct H SI2 Marquise Natural Diamond

EX • H/SI2 • GIA 2245015530

Certificate GIA 2245015530

Diamond specifications and retailer prices

From $3,963 AUD
As of November 4, 2026
Save $3,573 AUD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,536 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2245015530. Listed at 12 retailers as of November 4, 2026, with prices from $3,963 to $7,536, a $3,573 spread on the same certified stone. Helzberg Diamonds lists it at $7,536. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle39.86°
Pavilion angle37.96°
OriginNatural
Grading LabGIA
CertificateGIA 2245015530
Dimensions10.63 × 5.56 × 3.40 mm
L/W Ratio1.91
Culet sizeNone
Top View
10.63 mm5.56 mm1.21 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2245015530
Side View
Table 58.0%Crown 39.86°Girdle: MED-THKPavilion 37.96°Culet: NoneDepth 61.1%

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: $7,536 AUD|Low: $3,963 AUD|High: $8,254 AUD|Avg: $5,270 AUD|-8.7%
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 8$3,963 AUD
Retailer 7$4,002 AUD
Retailer 5$4,059 AUD
Retailer 9$4,273 AUD
Retailer 2$4,627 AUD
Retailer 3$4,774 AUD
Retailer 11$5,100 AUD
Retailer 10$5,226 AUD
Retailer 4$5,271 AUD
Retailer 6$7,113 AUD
Helzberg Diamonds$7,536 AUD

38 data points across 11 retailers

12 retailers$3,963 AUD to $7,536 AUD

A
Cheapest Retailer
-
$3,963 AUD
A
Retailer 2
-
$4,002 AUD
View
A
Retailer 3
-
$4,059 AUD
View
A
Retailer 4
-
$4,273 AUD
View
A
Retailer 5
-
$4,627 AUD
View
B+
Retailer 6
-
$4,774 AUD
View
B+
Retailer 7
-
$5,100 AUD
View
B+
Retailer 8
-
$5,226 AUD
View
B+
Retailer 9
-
$5,271 AUD
View
B
Retailer 10
-
$5,733 AUD
View
B
Retailer 11
-
$7,113 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLGHLLJG · Nov 6
$7,536 AUD
$5,178 USD
View
11 more retailers have this diamond
Prices start from $3,963 AUDSave up to $3,573 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
$3,963 AUD