Round|Natural|GIA

1.21ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2556873938

Certificate GIA 2556873938

Diamond specifications and retailer prices

From $1,893 USD
As of November 5, 2026
Save $1,245 USD (40%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $4,443 USD at Helzberg Diamonds · As of September 27, 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 2556873938. Listed at 15 retailers as of November 5, 2026, with a 66% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2556873938
Dimensions6.75 × 6.79 × 4.24 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.75 mm6.79 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556873938
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.6%

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 5
Current: $2,079 USD|Low: $1,893 USD|High: $3,373 USD|Avg: $2,364 USD|-7.4%
Retailer 1
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 12$1,893 USD
Retailer 7$1,905 USD
Retailer 9$1,913 USD
Retailer 10$1,920 USD
Retailer 5$1,936 USD
Retailer 4$1,989 USD
Retailer 1$2,079 USD
Retailer 3$2,083 USD
Retailer 14$2,280 USD
Retailer 8$2,419 USD
Retailer 2$2,445 USD
Retailer 6$2,889 USD
Retailer 11$2,917 USD
Retailer 13$3,138 USD

38 data points across 14 retailers

15 retailers$1,893 USD to $3,138 USD

A
Cheapest Retailer
-
$1,893 USD
A
Retailer 2
-
$1,905 USD
View
A
Retailer 3
-
$1,913 USD
View
A
Retailer 4
-
$1,920 USD
View
Retailer 5
-
$1,936 USD
View
Price last confirmed 7 days ago
A
Retailer 6
-
$1,989 USD
View
A
Retailer 7
-
$2,079 USD
View
A
Retailer 8
-
$2,083 USD
View
B+
Retailer 9
-
$2,280 USD
View
B+
Retailer 10
-
$2,419 USD
View
B+
Retailer 11
-
$2,445 USD
View
B+
Retailer 12
-
$2,501 USD
View
B+
Retailer 13
-
$2,917 USD
View
B+
Retailer 14
-
$3,138 USD
View
Most Expensive
Helzberg Diamonds
XZRILLKOOLOHO · Sep 27
$4,443 USD
View
Price last confirmed 40 days ago
14 more retailers have this diamond
Prices start from $1,893 USDSave up to $1,245 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
$1,893 USD