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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6555960270

Certificate GIA 6555960270

Diamond specifications and retailer prices

From $5,374 NZD
As of November 4, 2026
Save $4,845 NZD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $10,219 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555960270. Listed at 12 retailers as of November 4, 2026, with prices from $5,374 to $10,219, a $4,845 spread on the same certified stone. Helzberg Diamonds lists it at $10,219. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.95°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6555960270
Dimensions11.13 × 5.44 × 3.28 mm
L/W Ratio2.05
Culet sizeNone
Top View
11.13 mm5.44 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555960270
Side View
Table 58.0%Crown 36.95°Girdle: ThickPavilion 37.98°Culet: NDepth 60.2%

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: $10,219 NZD|Low: $5,374 NZD|High: $10,859 NZD|Avg: $7,107 NZD|-5.9%
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 8$5,374 NZD
Retailer 5$5,496 NZD
Retailer 7$5,504 NZD
Retailer 9$5,792 NZD
Retailer 2$6,270 NZD
Retailer 3$6,474 NZD
Retailer 10$6,819 NZD
Retailer 11$6,882 NZD
Retailer 12$7,012 NZD
Retailer 6$7,143 NZD
Retailer 4$9,590 NZD
Helzberg Diamonds$10,219 NZD

38 data points across 12 retailers

12 retailers$5,374 NZD to $10,219 NZD

A
Cheapest Retailer
-
$5,374 NZD
A
Retailer 2
-
$5,496 NZD
View
A
Retailer 3
-
$5,504 NZD
View
A
Retailer 4
-
$5,792 NZD
View
B+
Retailer 5
-
$6,270 NZD
View
B+
Retailer 6
-
$6,474 NZD
View
B+
Retailer 7
-
$6,819 NZD
View
B+
Retailer 8
-
$6,882 NZD
View
B+
Retailer 9
-
$7,012 NZD
View
B+
Retailer 10
-
$7,143 NZD
View
B
Retailer 11
-
$9,590 NZD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLLPMGING · Nov 6
$10,219 NZD
$5,665 USD
View
11 more retailers have this diamond
Prices start from $5,374 NZDSave up to $4,845 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
$5,374 NZD