Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6402352938

Certificate GIA 6402352938

Diamond specifications and retailer prices

From $3,609 NZD
As of November 6, 2026
18 retailers carry this diamond
Most expensive: $8,122 NZD at NZ Jewellers · As of October 23, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6402352938. Listed at 18 retailers as of November 6, 2026. 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

1.00
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6402352938
Dimensions6.42 × 6.45 × 3.89 mm
L/W Ratio1.00
Top View
6.42 mm6.45 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6402352938
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 60.4%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 6
Current: $3,741 NZD|Low: $3,383 NZD|High: $6,888 NZD|Avg: $4,223 NZD|-1.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 24, 2026
Retailer 2$3,383 NZD
Retailer 11$3,520 NZD
Retailer 3$3,584 NZD
Retailer 5$3,604 NZD
Retailer 9$3,609 NZD
Retailer 6$3,636 NZD
Retailer 1$3,741 NZD
Retailer 10$4,257 NZD
Retailer 7$4,687 NZD
Retailer 4$4,823 NZD
Retailer 8$6,842 NZD

32 data points across 11 retailers

18 retailers

Retailer 1
-
$3,181 NZD
Price last confirmed 14 days ago
Retailer 2
-
$3,383 NZD
View
Price last confirmed 14 days ago
Retailer 3
-
$3,520 NZD
View
Price last confirmed 39 days ago
Retailer 4
-
$3,520 NZD
View
Price last confirmed 21 days ago
Retailer 5
-
$3,584 NZD
View
Price last confirmed 14 days ago
Retailer 6
-
$3,604 NZD
View
Price last confirmed 14 days ago
B+
Retailer 7
-
$3,609 NZD
View
Retailer 8
-
$3,629 NZD
View
Price last confirmed 19 days ago
Retailer 9
-
$3,636 NZD
View
Price last confirmed 15 days ago
Retailer 10
-
$3,682 NZD
View
Price last confirmed 38 days ago
Retailer 11
-
$4,061 NZD
View
Price last confirmed 38 days ago
Retailer 12
-
$4,061 NZD
View
Price last confirmed 14 days ago
Retailer 13
-
$4,257 NZD
View
Price last confirmed 16 days ago
Retailer 14
-
$4,687 NZD
View
Price last confirmed 15 days ago
Retailer 15
-
$4,823 NZD
View
Price last confirmed 13 days ago
Retailer 16
-
$6,842 NZD
View
Price last confirmed 16 days ago
Retailer 17
-
$8,122 NZD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
03d9b590-2778-471e-9db8-df4130d44ffd · Oct 23
$8,122 NZD
$4,566 USD
View
Price last confirmed 14 days ago
17 more retailers have this diamond
Prices start from $3,609 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+
1.00ct Round
$3,609 NZD