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Marquise|Natural|IGI

1.21ct E SI2 Marquise Natural Diamond

VG • E/SI2 • IGI 830653516

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 830653516

Diamond specifications and retailer prices

From $3,407 AUD
As of November 5, 2026
Save $2,920 AUD (46%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $6,327 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 E colour (colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 830653516. Listed at 8 retailers as of November 5, 2026, with prices from $3,407 to $6,327, a $2,920 spread on the same certified stone. Helzberg Diamonds lists it at $6,327. 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
E
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39°
Pavilion angle38.7°
OriginNatural
Grading LabIGI
CertificateIGI 830653516
Dimensions10.57 × 5.59 × 3.35 mm
L/W Ratio1.89
Girdle conditionFaceted
Top View
10.57 mm5.59 mm1.21 ctE / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 830653516
Side View
Table 60.0%Crown 39°Girdle: MediumPavilion 38.7°Culet: NoneDepth 59.9%

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 5
Current: $6,327 AUD|Low: $3,403 AUD|High: $6,327 AUD|Avg: $4,855 AUD
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 3$3,407 AUD
Retailer 5$3,618 AUD
Retailer 6$3,681 AUD
Retailer 7$4,481 AUD
Retailer 2$4,721 AUD
Retailer 4$6,050 AUD
Helzberg Diamonds$6,327 AUD

12 data points across 7 retailers

8 retailers$3,407 AUD to $6,327 AUD

A
Cheapest Retailer
-
$3,407 AUD
A
Retailer 2
-
$3,618 AUD
View
A
Retailer 3
-
$3,664 AUD
View
A
Retailer 4
-
$3,681 AUD
View
B+
Retailer 5
-
$4,481 AUD
View
A
Retailer 6
-
$4,721 AUD
View
B+
Retailer 7
-
$6,050 AUD
View
Most Expensive
B+
Helzberg Diamonds
ZXZOJGMLJLHM · Nov 6
$6,327 AUD
$4,429 USD
View
7 more retailers have this diamond
Prices start from $3,407 AUDSave up to $2,920 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
$3,407 AUD