Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6402352938

Certificate GIA 6402352938

Diamond specifications and retailer prices

From $2,592 SGD
As of November 6, 2026
18 retailers carry this diamond
Most expensive: $5,832 SGD 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: $2,686 SGD|Low: $2,429 SGD|High: $4,946 SGD|Avg: $3,033 SGD|-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$2,429 SGD
Retailer 11$2,528 SGD
Retailer 3$2,574 SGD
Retailer 5$2,588 SGD
Retailer 9$2,592 SGD
Retailer 6$2,611 SGD
Retailer 1$2,686 SGD
Retailer 10$3,057 SGD
Retailer 7$3,366 SGD
Retailer 4$3,463 SGD
Retailer 8$4,912 SGD

32 data points across 11 retailers

18 retailers

Retailer 1
-
$2,284 SGD
Price last confirmed 14 days ago
Retailer 2
-
$2,429 SGD
View
Price last confirmed 14 days ago
Retailer 3
-
$2,528 SGD
View
Price last confirmed 39 days ago
Retailer 4
-
$2,528 SGD
View
Price last confirmed 21 days ago
Retailer 5
-
$2,574 SGD
View
Price last confirmed 14 days ago
Retailer 6
-
$2,588 SGD
View
Price last confirmed 14 days ago
B+
Retailer 7
-
$2,592 SGD
View
Retailer 8
-
$2,606 SGD
View
Price last confirmed 19 days ago
Retailer 9
-
$2,611 SGD
View
Price last confirmed 15 days ago
Retailer 10
-
$2,644 SGD
View
Price last confirmed 38 days ago
Retailer 11
-
$2,916 SGD
View
Price last confirmed 38 days ago
Retailer 12
-
$2,916 SGD
View
Price last confirmed 14 days ago
Retailer 13
-
$3,057 SGD
View
Price last confirmed 16 days ago
Retailer 14
-
$3,366 SGD
View
Price last confirmed 15 days ago
Retailer 15
-
$3,463 SGD
View
Price last confirmed 13 days ago
Retailer 16
-
$4,912 SGD
View
Price last confirmed 16 days ago
Retailer 17
-
$5,832 SGD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
03d9b590-2778-471e-9db8-df4130d44ffd · Oct 23
$5,832 SGD
$4,566 USD
View
Price last confirmed 14 days ago
17 more retailers have this diamond
Prices start from $2,592 SGD

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
$2,592 SGD