Round|Natural|GIA

1.00ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 6505412227

Certificate GIA 6505412227

Diamond specifications and retailer prices

From $1,613 USD
As of November 4, 2026
Save $2,782 USD (63%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $4,395 USD at NZ Jewellers · As of November 5, 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 6505412227. Listed at 16 retailers as of November 4, 2026, with prices from $1,613 to $4,395, a $2,782 spread on the same certified stone. NZ Jewellers lists it at $4,395. 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
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle31.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6505412227
Dimensions6.47 × 6.43 × 3.92 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.47 mm6.43 mm1.00 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6505412227
Side View
Table 59.0%Crown 31.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $1,724 USD|Low: $1,580 USD|High: $3,195 USD|Avg: $2,058 USD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 11$1,613 USD
Retailer 3$1,642 USD
Retailer 10$1,670 USD
Retailer 1$1,724 USD
Retailer 12$1,808 USD
Retailer 2$1,860 USD
Retailer 4$1,885 USD
Retailer 8$1,988 USD
Retailer 5$2,089 USD
Retailer 7$2,199 USD
Retailer 6$2,441 USD
Retailer 9$3,148 USD

37 data points across 12 retailers

16 retailers$1,613 USD to $4,395 USD

A
Cheapest Retailer
-
$1,613 USD
A
Retailer 2
-
$1,642 USD
View
A
Retailer 3
-
$1,670 USD
View
A
Retailer 4
-
$1,724 USD
View
Retailer 5
-
$1,802 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$1,802 USD
View
B+
Retailer 7
-
$1,808 USD
View
B+
Retailer 8
-
$1,860 USD
View
B+
Retailer 9
-
$1,885 USD
View
B+
Retailer 10
-
$1,988 USD
View
B+
Retailer 11
-
$2,079 USD
View
B+
Retailer 12
-
$2,089 USD
View
B+
Retailer 13
-
$2,199 USD
View
B
Retailer 14
-
$2,441 USD
View
B
Retailer 15
-
$3,148 USD
View
Most Expensive
B
NZ Jewellers
86dc830f-720d-427e-b48b-c56f5dd959f7 · Nov 5
$4,395 USD
View
15 more retailers have this diamond
Prices start from $1,613 USDSave up to $2,782 USD

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
1.00ct Round
$1,613 USD