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Marquise|Natural|GIA

1.21ct H SI2 Marquise Natural Diamond

EX • H/SI2 • GIA 2245015530

Certificate GIA 2245015530

Diamond specifications and retailer prices

From $4,912 NZD
As of November 4, 2026
Save $4,429 NZD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $9,341 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 H 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 2245015530. Listed at 12 retailers as of November 4, 2026, with prices from $4,912 to $9,341, a $4,429 spread on the same certified stone. Helzberg Diamonds lists it at $9,341. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle39.86°
Pavilion angle37.96°
OriginNatural
Grading LabGIA
CertificateGIA 2245015530
Dimensions10.63 × 5.56 × 3.40 mm
L/W Ratio1.91
Culet sizeNone
Top View
10.63 mm5.56 mm1.21 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2245015530
Side View
Table 58.0%Crown 39.86°Girdle: MED-THKPavilion 37.96°Culet: NoneDepth 61.1%

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 4
Current: $9,341 NZD|Low: $4,912 NZD|High: $10,230 NZD|Avg: $6,531 NZD|-8.7%
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 8$4,912 NZD
Retailer 7$4,961 NZD
Retailer 5$5,031 NZD
Retailer 9$5,296 NZD
Retailer 2$5,735 NZD
Retailer 3$5,917 NZD
Retailer 11$6,321 NZD
Retailer 10$6,478 NZD
Retailer 4$6,534 NZD
Retailer 6$8,816 NZD
Helzberg Diamonds$9,341 NZD

38 data points across 11 retailers

12 retailers$4,912 NZD to $9,341 NZD

A
Cheapest Retailer
-
$4,912 NZD
A
Retailer 2
-
$4,961 NZD
View
A
Retailer 3
-
$5,031 NZD
View
A
Retailer 4
-
$5,296 NZD
View
A
Retailer 5
-
$5,735 NZD
View
B+
Retailer 6
-
$5,917 NZD
View
B+
Retailer 7
-
$6,321 NZD
View
B+
Retailer 8
-
$6,478 NZD
View
B+
Retailer 9
-
$6,534 NZD
View
B
Retailer 10
-
$7,106 NZD
View
B
Retailer 11
-
$8,816 NZD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLGHLLJG · Nov 6
$9,341 NZD
$5,178 USD
View
11 more retailers have this diamond
Prices start from $4,912 NZDSave up to $4,429 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
$4,912 NZD