Round|Natural|GIA

1.21ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2554019948

Certificate GIA 2554019948

Diamond specifications and retailer prices

From $2,279 USD
As of November 5, 2026
Save $3,156 USD (58%) vs most expensive(unlock to see where)
30 retailers carry this diamond
Most expensive: $5,435 USD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554019948. Listed at 30 retailers as of November 5, 2026, with a 138% 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
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2554019948
Dimensions6.75 × 6.79 × 4.23 mm
L/W Ratio1.01
Star length50%
Top View
6.75 mm6.79 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554019948
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.1%

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: $2,944 USD|Low: $2,279 USD|High: $5,279 USD|Avg: $3,289 USD|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 6$2,279 USD
Retailer 11$2,608 USD
Retailer 9$2,826 USD
Retailer 1$2,944 USD
Retailer 3$3,100 USD
Retailer 10$3,100 USD
Retailer 4$3,188 USD
Retailer 2$3,200 USD
Retailer 7$3,600 USD
Retailer 5$3,623 USD
Retailer 8$5,203 USD

33 data points across 11 retailers

30 retailers$2,279 USD to $5,435 USD

A
Cheapest Retailer
-
$2,279 USD
A
Retailer 2
-
$2,531 USD
View
A
Retailer 3
-
$2,608 USD
View
Final sale: no returns
Retailer 4
-
$2,826 USD
View
Price last confirmed 8 days ago
Retailer 5
-
$2,826 USD
View
Price last confirmed 53 days ago
Retailer 6
-
$2,826 USD
View
Price last confirmed 50 days ago
Retailer 7
-
$2,826 USD
View
Price last confirmed 21 days ago
Retailer 8
-
$2,826 USD
View
Price last confirmed 29 days ago
Retailer 9
-
$2,826 USD
View
Price last confirmed 15 days ago
B+
Retailer 10
-
$2,857 USD
View
Retailer 11
-
$2,935 USD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$2,944 USD
View
B+
Retailer 13
-
$3,100 USD
View
B+
Retailer 14
-
$3,100 USD
View
B+
Retailer 15
-
$3,188 USD
View
B+
Retailer 16
-
$3,200 USD
View
Retailer 17
-
$3,261 USD
View
Price last confirmed 28 days ago
Retailer 18
-
$3,261 USD
View
Price last confirmed 53 days ago
Retailer 19
-
$3,261 USD
View
Price last confirmed 46 days ago
Retailer 20
-
$3,261 USD
View
Price last confirmed 16 days ago
B+
Retailer 21
-
$3,261 USD
View
B+
Retailer 22
-
$3,600 USD
View
Retailer 23
-
$3,621 USD
View
Price last confirmed 22 days ago
B+
Retailer 24
-
$3,623 USD
View
B
Retailer 25
-
$5,203 USD
View
Retailer 26
-
$5,435 USD
View
Price last confirmed 28 days ago
B
Retailer 27
-
$5,435 USD
View
Retailer 28
-
$5,435 USD
View
Price last confirmed 47 days ago
Retailer 29
-
$5,435 USD
View
Price last confirmed 54 days ago
Most Expensive
NZ Jewellers
24d6ce57-5de8-432d-9b87-8fbf5ceb647d · Oct 20
$5,435 USD
View
Price last confirmed 16 days ago
29 more retailers have this diamond
Prices start from $2,279 USDSave up to $3,156 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
$2,279 USD