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1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • HRD 260000116770

Certificate HRD 260000116770

Diamond specifications and retailer prices

From $1,133 USD
As of November 6, 2026
Save $2,545 USD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,678 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by HRD 260000116770. Listed at 15 retailers as of November 5, 2026, with prices from $1,133 to $3,678, a $2,545 spread on the same certified stone. NZ Jewellers lists it at $3,678. 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
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.6°
Pavilion angle40.8°
OriginNatural
Grading LabHRD
CertificateHRD 260000116770
Dimensions6.34 × 6.39 × 4.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.34 mm6.39 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 260000116770
Side View
Table 56.0%Crown 36.6°Girdle: MED-MEDPavilion 40.8°Culet: NoneDepth 62.9%

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 6
Current: $3,678 USD|Low: $1,133 USD|High: $3,773 USD|Avg: $1,892 USD|-2.5%
NZ Jewellers
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
November 6, 2026
Retailer 2$1,133 USD
Retailer 9$1,382 USD
Retailer 4$1,391 USD
Retailer 12$1,411 USD
Retailer 5$1,508 USD
Retailer 13$1,577 USD
Retailer 7$1,691 USD
Retailer 3$1,740 USD
Retailer 8$1,758 USD
Retailer 11$1,966 USD
Retailer 6$2,173 USD
Retailer 14$2,489 USD
Retailer 10$2,635 USD
NZ Jewellers$3,678 USD

34 data points across 14 retailers

15 retailers$1,133 USD to $3,678 USD

A
Cheapest Retailer
-
$1,133 USD
A
Retailer 2
-
$1,382 USD
View
A
Retailer 3
-
$1,391 USD
View
Final sale: no returns
A
Retailer 4
-
$1,411 USD
View
A
Retailer 5
-
$1,508 USD
View
A
Retailer 6
-
$1,577 USD
View
B+
Retailer 7
-
$1,682 USD
View
A
Retailer 8
-
$1,691 USD
View
B+
Retailer 9
-
$1,740 USD
View
A
Retailer 10
-
$1,758 USD
View
B+
Retailer 11
-
$1,966 USD
View
B+
Retailer 12
-
$2,173 USD
View
B
Retailer 13
-
$2,489 USD
View
B
Retailer 14
-
$2,635 USD
View
Most Expensive
B
NZ Jewellers
09ec0cc1-6dc2-4b6c-825e-9b34c40caf83 · Nov 5
$3,678 USD
View
14 more retailers have this diamond
Prices start from $1,133 USDSave up to $2,545 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
$1,133 USD