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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 6551273825

Certificate GIA 6551273825

Diamond specifications and retailer prices

From $4,699 NZD
As of November 5, 2026
Save $3,853 NZD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $8,552 NZD 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6551273825. Listed at 12 retailers as of November 5, 2026, with prices from $4,699 to $8,552, a $3,853 spread on the same certified stone. Helzberg Diamonds lists it at $8,552. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.52°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6551273825
Dimensions9.85 × 5.41 × 3.52 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.85 mm5.41 mm1.21 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551273825
Side View
Table 60.0%Crown 43.52°Girdle: MED-VTKPavilion 37.98°Culet: NoneDepth 65.1%

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 5
Current: $8,552 NZD|Low: $4,587 NZD|High: $9,270 NZD|Avg: $6,300 NZD|-7.7%
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 7$4,699 NZD
Retailer 4$4,890 NZD
Retailer 8$4,973 NZD
Retailer 2$5,300 NZD
Retailer 3$5,415 NZD
Retailer 5$5,480 NZD
Retailer 10$5,814 NZD
Retailer 6$5,978 NZD
Retailer 11$5,998 NZD
Retailer 9$8,067 NZD
Helzberg Diamonds$8,552 NZD

44 data points across 11 retailers

12 retailers$4,699 NZD to $8,552 NZD

A
Cheapest Retailer
-
$4,699 NZD
A
Retailer 2
-
$4,890 NZD
View
B+
Retailer 3
-
$4,973 NZD
View
B+
Retailer 4
-
$5,300 NZD
View
B+
Retailer 5
-
$5,415 NZD
View
B+
Retailer 6
-
$5,480 NZD
View
B+
Retailer 7
-
$5,814 NZD
View
B+
Retailer 8
-
$5,978 NZD
View
B+
Retailer 9
-
$5,998 NZD
View
B
Retailer 10
-
$6,507 NZD
View
B
Retailer 11
-
$8,067 NZD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLHINJOIL · Nov 6
$8,552 NZD
$4,741 USD
View
11 more retailers have this diamond
Prices start from $4,699 NZDSave up to $3,853 NZD

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
$4,699 NZD