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Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6512424390

Certificate GIA 6512424390

Diamond specifications and retailer prices

From $6,956 NZD
As of November 5, 2026
Save $6,813 NZD (49%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $13,769 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 6512424390. Listed at 17 retailers as of November 5, 2026, with prices from $6,956 to $13,769, a $6,813 spread on the same certified stone. NZ Jewellers lists it at $13,769. 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 angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6512424390
Dimensions6.86 × 6.81 × 4.22 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Twinning Wisp, Feather, Needle, Indented Natural
Top View
6.86 mm6.81 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512424390
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $7,955 NZD|Low: $6,079 NZD|High: $13,055 NZD|Avg: $8,396 NZD|+1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 7, 2026
Retailer 5$7,008 NZD
Retailer 2$7,174 NZD
Retailer 7$7,295 NZD
Retailer 9$7,511 NZD
Retailer 10$7,903 NZD
Retailer 1$7,955 NZD
Retailer 8$8,430 NZD
Retailer 3$8,886 NZD
Retailer 4$9,642 NZD
Retailer 6$12,900 NZD

45 data points across 10 retailers

17 retailers$6,956 NZD to $13,769 NZD

B+
Cheapest Retailer
-
$6,956 NZD
B+
Retailer 2
-
$7,008 NZD
View
B+
Retailer 3
-
$7,174 NZD
View
B+
Retailer 4
-
$7,295 NZD
View
Final sale: no returns
B+
Retailer 5
-
$7,495 NZD
View
Retailer 6
-
$7,903 NZD
View
Price last confirmed 9 days ago
B
Retailer 7
-
$7,903 NZD
View
B
Retailer 8
-
$7,903 NZD
View
B+
Retailer 9
-
$7,955 NZD
View
B
Retailer 10
-
$8,170 NZD
View
Retailer 11
-
$8,430 NZD
View
Price last confirmed 29 days ago
B
Retailer 12
-
$8,886 NZD
View
B
Retailer 13
-
$9,119 NZD
View
B
Retailer 14
-
$9,642 NZD
View
B
Retailer 15
-
$12,557 NZD
View
B
Retailer 16
-
$12,900 NZD
View
Most Expensive
B
NZ Jewellers
26c924ad-4a91-43a5-8d77-a32aea1d223a · Nov 5
$13,769 NZD
$7,633 USD
View
16 more retailers have this diamond
Prices start from $6,956 NZDSave up to $6,813 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.

B+
1.21ct Round
$6,956 NZD