Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2243122857

Certificate GIA 2243122857

Diamond specifications and retailer prices

From $2,190 USD
As of November 6, 2026
Save $1,767 USD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $3,957 USD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.21ct natural round diamond

This 1.21ct 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 2243122857. Listed at 12 retailers as of November 6, 2026, with prices from $2,190 to $3,957, a $1,767 spread on the same certified stone. Helzberg Diamonds lists it at $3,957. 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

1.21
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2243122857
Dimensions6.81 × 6.83 × 4.25 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.81 mm6.83 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2243122857
Side View
Table 56.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.3%

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: $3,957 USD|Low: $2,190 USD|High: $3,957 USD|Avg: $2,879 USD
Helzberg Diamonds
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 2$2,190 USD
Retailer 7$2,349 USD
Retailer 3$2,392 USD
Retailer 11$2,404 USD
Retailer 8$2,480 USD
Retailer 5$2,749 USD
Retailer 10$2,752 USD
Retailer 6$2,770 USD
Retailer 9$2,821 USD
Retailer 12$3,366 USD
Retailer 4$3,599 USD
Helzberg Diamonds$3,957 USD

3 data points across 12 retailers

12 retailers$2,190 USD to $3,957 USD

A
Cheapest Retailer
-
$2,190 USD
B+
Retailer 2
-
$2,349 USD
View
B+
Retailer 3
-
$2,392 USD
View
B+
Retailer 4
-
$2,404 USD
View
B+
Retailer 5
-
$2,480 USD
View
B
Retailer 6
-
$2,749 USD
View
B
Retailer 7
-
$2,752 USD
View
B+
Retailer 8
-
$2,770 USD
View
B
Retailer 9
-
$2,821 USD
View
B
Retailer 10
-
$3,366 USD
View
B
Retailer 11
-
$3,599 USD
View
Most Expensive
B
Helzberg Diamonds
XZRIIKJHIIOLN · Nov 6
$3,957 USD
View
11 more retailers have this diamond
Prices start from $2,190 USDSave up to $1,767 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
1.21ct Round
$2,190 USD