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Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1563314290

Certificate GIA 1563314290

Diamond specifications and retailer prices

From $5,442 NZD
As of October 31, 2026
Save $4,910 NZD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $10,353 NZD at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1563314290. Listed at 15 retailers as of October 31, 2026, with prices from $5,442 to $10,353, a $4,910 spread on the same certified stone. Helzberg Diamonds lists it at $10,353. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1563314290
Dimensions6.85 × 6.89 × 4.20 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.85 mm6.89 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563314290
Side View
Table 58.0%Crown 33°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.2%

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: Oct 31
Current: $10,353 NZD|Low: $5,442 NZD|High: $10,746 NZD|Avg: $7,359 NZD|-3.7%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 12$5,442 NZD
Retailer 8$5,754 NZD
Retailer 14$5,794 NZD
Retailer 4$5,866 NZD
Retailer 11$5,935 NZD
Retailer 2$6,371 NZD
Retailer 3$6,548 NZD
Retailer 6$6,555 NZD
Retailer 13$6,965 NZD
Retailer 5$7,091 NZD
Retailer 9$7,246 NZD
Retailer 16$7,490 NZD
Retailer 10$7,551 NZD
Retailer 15$9,180 NZD
Retailer 7$9,958 NZD
Helzberg Diamonds$10,353 NZD

34 data points across 16 retailers

15 retailers$5,442 NZD to $10,353 NZD

A
Cheapest Retailer
-
$5,442 NZD
B+
Retailer 2
-
$5,794 NZD
View
B+
Retailer 3
-
$5,866 NZD
View
B+
Retailer 4
-
$5,935 NZD
View
B+
Retailer 5
-
$6,371 NZD
View
B+
Retailer 6
-
$6,548 NZD
View
B+
Retailer 7
-
$6,555 NZD
View
B+
Retailer 8
-
$6,965 NZD
View
B+
Retailer 9
-
$7,091 NZD
View
B+
Retailer 10
-
$7,246 NZD
View
B+
Retailer 11
-
$7,490 NZD
View
B+
Retailer 12
-
$7,551 NZD
View
B
Retailer 13
-
$9,180 NZD
View
Retailer 14
-
$9,958 NZD
View
Price last confirmed 17 days ago
Most Expensive
B
Helzberg Diamonds
XZRHLMJJHKIPG · Nov 1
$10,353 NZD
$5,739 USD
View
14 more retailers have this diamond
Prices start from $5,442 NZDSave up to $4,910 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 Round
$5,442 NZD