Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2506134651

Shape and cutting style on the report: Round brilliant

Certificate GIA 2506134651

Diamond specifications and retailer prices

From $1,835 USD
As of November 6, 2026
Save $3,480 USD (65%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $5,315 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 GIA 2506134651. Listed at 21 retailers as of November 5, 2026, with prices from $1,835 to $5,315, a $3,480 spread on the same certified stone. NZ Jewellers lists it at $5,315. 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
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2506134651
Dimensions6.39 × 6.35 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.39 mm6.35 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2506134651
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $1,835 USD|Low: $1,835 USD|High: $4,507 USD|Avg: $2,718 USD|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$1,835 USD
Retailer 7$1,868 USD
Retailer 8$2,297 USD
Retailer 9$2,346 USD
Retailer 2$2,399 USD
Retailer 3$2,674 USD
Retailer 6$2,874 USD
Retailer 4$3,103 USD
Retailer 5$4,442 USD

29 data points across 9 retailers

21 retailers$1,835 USD to $5,315 USD

A
Cheapest Retailer
-
$1,835 USD
B+
Retailer 2
-
$1,868 USD
View
B+
Retailer 3
-
$2,225 USD
View
B+
Retailer 4
-
$2,229 USD
View
B+
Retailer 5
-
$2,297 USD
View
Retailer 6
-
$2,317 USD
View
Price last confirmed 82 days ago
B
Retailer 7
-
$2,346 USD
View
Final sale: no returns
B+
Retailer 8
-
$2,399 USD
View
B+
Retailer 9
-
$2,520 USD
View
B+
Retailer 10
-
$2,542 USD
View
B
Retailer 11
-
$2,590 USD
View
B
Retailer 12
-
$2,660 USD
View
B+
Retailer 13
-
$2,674 USD
View
B
Retailer 14
-
$2,682 USD
View
Retailer 15
-
$2,848 USD
View
Price last confirmed 30 days ago
B
Retailer 16
-
$2,874 USD
View
B
Retailer 17
-
$2,933 USD
View
B
Retailer 18
-
$3,103 USD
View
B
Retailer 19
-
$3,483 USD
View
B
Retailer 20
-
$4,442 USD
View
Most Expensive
B
NZ Jewellers
8b7bb6df-972d-41c2-b5d1-2a135753b617 · Nov 5
$5,315 USD
View
20 more retailers have this diamond
Prices start from $1,835 USDSave up to $3,480 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
$1,835 USD