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Marquise|Natural|IGI

1.21ct H SI1 Marquise Natural Diamond

VG • H/SI1 • IGI 817688907

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 817688907

Diamond specifications and retailer prices

From $3,879 AUD
As of November 1, 2026
13 retailers carry this diamond
Most expensive: $8,419 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 817688907. Listed at 13 retailers as of November 1, 2026. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle37.2°
OriginNatural
Grading LabIGI
CertificateIGI 817688907
Dimensions10.72 × 5.50 × 3.27 mm
L/W Ratio1.95
Girdle conditionFaceted
Top View
10.72 mm5.50 mm1.21 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 817688907
Side View
Table 63.0%Crown 37°Girdle: STK-THKPavilion 37.2°Culet: NoneDepth 59.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: $3,879 AUD|Low: $3,879 AUD|High: $8,178 AUD|Avg: $5,165 AUD|-11.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 18, 2026
Retailer 1$3,879 AUD
Retailer 3$4,291 AUD
Retailer 8$4,407 AUD
Retailer 10$4,624 AUD
Retailer 9$4,672 AUD
Retailer 11$4,833 AUD
Retailer 2$5,042 AUD
Retailer 4$5,088 AUD
Retailer 6$5,634 AUD
Retailer 7$5,868 AUD
Retailer 5$8,168 AUD

23 data points across 11 retailers

13 retailers

A
Cheapest Retailer
-
$3,879 AUD
Retailer 2
-
$4,291 AUD
View
Price last confirmed 23 days ago
Retailer 3
-
$4,624 AUD
View
Price last confirmed 24 days ago
Retailer 4
-
$4,833 AUD
View
Price last confirmed 30 days ago
Retailer 5
-
$4,833 AUD
View
Price last confirmed 26 days ago
Retailer 6
-
$5,018 AUD
View
Price last confirmed 37 days ago
Retailer 7
-
$5,042 AUD
View
Price last confirmed 24 days ago
Retailer 8
-
$5,088 AUD
View
Price last confirmed 23 days ago
Retailer 9
-
$5,576 AUD
View
Price last confirmed 29 days ago
Retailer 10
-
$5,576 AUD
View
Price last confirmed 62 days ago
Retailer 11
-
$5,868 AUD
View
Price last confirmed 26 days ago
Retailer 12
-
$8,168 AUD
View
Price last confirmed 23 days ago
Most Expensive
NZ Jewellers
250d0520-c188-4d1e-8dd6-2e9d6ce74937 · Sep 30
$8,419 AUD
$5,785 USD
View
Price last confirmed 37 days ago
12 more retailers have this diamond
Prices start from $3,879 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
$3,879 AUD