Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1563314290

Certificate GIA 1563314290

Diamond specifications and retailer prices

From $3,017 USD
As of October 31, 2026
Save $2,722 USD (47%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $5,739 USD at Helzberg Diamonds · As of November 1, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1563314290. Listed at 15 retailers as of October 31, 2026, with prices from $3,017 to $5,739, a $2,722 spread on the same certified stone. Helzberg Diamonds lists it at $5,739. 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
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1563314290
Dimensions6.85 × 6.89 × 4.20 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.85 mm6.89 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1563314290
Side View
Table 58.0%Crown 33°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.2%

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: Oct 31
Current: $5,739 USD|Low: $3,017 USD|High: $5,957 USD|Avg: $4,078 USD|-3.7%
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
Retailer 16
November 2, 2026
Retailer 12$3,017 USD
Retailer 8$3,190 USD
Retailer 14$3,212 USD
Retailer 4$3,252 USD
Retailer 11$3,290 USD
Retailer 2$3,532 USD
Retailer 3$3,630 USD
Retailer 6$3,634 USD
Retailer 13$3,861 USD
Retailer 5$3,931 USD
Retailer 9$4,017 USD
Retailer 16$4,152 USD
Retailer 10$4,186 USD
Retailer 15$5,089 USD
Retailer 7$5,520 USD
Helzberg Diamonds$5,739 USD

35 data points across 16 retailers

15 retailers$3,017 USD to $5,739 USD

A
Cheapest Retailer
-
$3,017 USD
B+
Retailer 2
-
$3,212 USD
View
B+
Retailer 3
-
$3,252 USD
View
B+
Retailer 4
-
$3,290 USD
View
B+
Retailer 5
-
$3,532 USD
View
B+
Retailer 6
-
$3,630 USD
View
B+
Retailer 7
-
$3,634 USD
View
B+
Retailer 8
-
$3,861 USD
View
B+
Retailer 9
-
$3,931 USD
View
B+
Retailer 10
-
$4,017 USD
View
B+
Retailer 11
-
$4,152 USD
View
B+
Retailer 12
-
$4,186 USD
View
B
Retailer 13
-
$5,089 USD
View
Retailer 14
-
$5,520 USD
View
Price last confirmed 16 days ago
Most Expensive
B
Helzberg Diamonds
XZRHLMJJHKIPG · Nov 1
$5,739 USD
View
14 more retailers have this diamond
Prices start from $3,017 USDSave up to $2,722 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
$3,017 USD