Round|Natural|GIA

1.03ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2566647312

Certificate GIA 2566647312

Diamond specifications and retailer prices

From $1,876 USD
As of November 4, 2026
Save $1,524 USD (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,400 USD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.03ct natural round diamond

This 1.03ct 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 2566647312. Listed at 15 retailers as of November 4, 2026, with prices from $1,876 to $3,400, a $1,524 spread on the same certified stone. Helzberg Diamonds lists it at $3,400. 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

1.03
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566647312
Dimensions6.46 × 6.49 × 4.01 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.46 mm6.49 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566647312
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.9%

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 4
Current: $3,400 USD|Low: $1,876 USD|High: $3,638 USD|Avg: $2,469 USD|-6.5%
Helzberg Diamonds
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
Retailer 15
November 6, 2026
Retailer 5$1,876 USD
Retailer 11$1,929 USD
Retailer 4$1,951 USD
Retailer 10$1,977 USD
Retailer 7$2,013 USD
Retailer 2$2,050 USD
Retailer 6$2,060 USD
Retailer 14$2,066 USD
Retailer 12$2,262 USD
Retailer 13$2,428 USD
Retailer 15$2,463 USD
Retailer 9$2,724 USD
Retailer 8$2,892 USD
Retailer 3$3,174 USD
Helzberg Diamonds$3,400 USD

20 data points across 15 retailers

15 retailers$1,876 USD to $3,400 USD

A
Cheapest Retailer
-
$1,876 USD
B+
Retailer 2
-
$1,929 USD
View
B+
Retailer 3
-
$1,951 USD
View
B+
Retailer 4
-
$1,977 USD
View
B+
Retailer 5
-
$2,013 USD
View
B+
Retailer 6
-
$2,050 USD
View
B+
Retailer 7
-
$2,060 USD
View
B+
Retailer 8
-
$2,066 USD
View
B+
Retailer 9
-
$2,262 USD
View
B+
Retailer 10
-
$2,428 USD
View
B
Retailer 11
-
$2,463 USD
View
B+
Retailer 12
-
$2,724 USD
View
B
Retailer 13
-
$2,892 USD
View
B
Retailer 14
-
$3,174 USD
View
Most Expensive
B
Helzberg Diamonds
XZRILMMMKNJHI · Nov 6
$3,400 USD
View
14 more retailers have this diamond
Prices start from $1,876 USDSave up to $1,524 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
1.03ct Round
$1,876 USD