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Marquise|Natural|GIA

1.21ct H SI2 Marquise Natural Diamond

VG • H/SI2 • GIA 6551370295

Certificate GIA 6551370295

Diamond specifications and retailer prices

From $4,694 AUD
As of November 4, 2026
Save $3,720 AUD (44%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,414 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 very-good cut grade stated by the retailer rather than the lab and certified by GIA 6551370295. Listed at 12 retailers as of November 4, 2026, with prices from $4,694 to $8,414, a $3,720 spread on the same certified stone. Helzberg Diamonds lists it at $8,414. 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
H
Colour
SI2
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
Crown angle40.97°
Pavilion angle39.32°
OriginNatural
Grading LabGIA
CertificateGIA 6551370295
Dimensions10.12 × 5.47 × 3.54 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.12 mm5.47 mm1.21 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6551370295
Side View
Table 60.0%Crown 40.97°Girdle: MED-VTKPavilion 39.32°Culet: NoneDepth 64.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $8,414 AUD|Low: $4,694 AUD|High: $8,760 AUD|Avg: $6,042 AUD|-2.0%
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 7, 2026
Retailer 10$4,694 AUD
Retailer 9$4,781 AUD
Retailer 12$5,017 AUD
Retailer 8$5,072 AUD
Retailer 4$5,123 AUD
Retailer 2$5,420 AUD
Retailer 11$5,986 AUD
Retailer 3$6,070 AUD
Retailer 6$6,242 AUD
Retailer 5$6,511 AUD
Retailer 7$8,380 AUD
Helzberg Diamonds$8,414 AUD

41 data points across 12 retailers

12 retailers$4,694 AUD to $8,414 AUD

B+
Cheapest Retailer
-
$4,694 AUD
B+
Retailer 2
-
$5,017 AUD
View
B+
Retailer 3
-
$5,072 AUD
View
B+
Retailer 4
-
$5,123 AUD
View
B+
Retailer 5
-
$5,420 AUD
View
B
Retailer 6
-
$5,986 AUD
View
B
Retailer 7
-
$6,070 AUD
View
B
Retailer 8
-
$6,232 AUD
View
B
Retailer 9
-
$6,242 AUD
View
B
Retailer 10
-
$6,511 AUD
View
B
Retailer 11
-
$8,380 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLHJNGIPL · Nov 6
$8,414 AUD
$5,781 USD
View
11 more retailers have this diamond
Prices start from $4,694 AUDSave up to $3,720 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.

B+
1.21ct Marquise
$4,694 AUD