Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2507471981

Certificate GIA 2507471981

Diamond specifications and retailer prices

From $3,986 CAD
As of November 6, 2026
Save $6,919 CAD (63%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $10,905 CAD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

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 2507471981. Listed at 24 retailers as of November 5, 2026, with prices from $3,986 to $10,905, a $6,919 spread on the same certified stone. Diamond Quarter lists it at $10,905. 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
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2507471981
Dimensions6.77 × 6.74 × 4.23 mm
L/W Ratio1.00
Star length50%
Lower girdle75%
Top View
6.77 mm6.74 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2507471981
Side View
Table 59.0%Crown 36°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

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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 6
Current: $5,098 CAD|Low: $3,986 CAD|High: $9,283 CAD|Avg: $6,348 CAD|-1.9%
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 10$3,986 CAD
Retailer 11$4,917 CAD
Retailer 4$5,015 CAD
Retailer 1$5,098 CAD
Retailer 5$5,331 CAD
Retailer 2$5,707 CAD
Retailer 8$6,127 CAD
Retailer 6$6,190 CAD
Retailer 7$6,503 CAD
Retailer 9$8,910 CAD
Retailer 3$9,283 CAD

36 data points across 11 retailers

24 retailers$3,986 CAD to $10,905 CAD

A
Cheapest Retailer
-
$3,986 CAD
B+
Retailer 2
-
$4,730 CAD
View
B+
Retailer 3
-
$4,807 CAD
View
B+
Retailer 4
-
$4,917 CAD
View
Final sale: no returns
B+
Retailer 5
-
$5,015 CAD
View
B+
Retailer 6
-
$5,045 CAD
View
Retailer 7
-
$5,054 CAD
View
Price last confirmed 117 days ago
B+
Retailer 8
-
$5,098 CAD
View
B+
Retailer 9
-
$5,098 CAD
View
Retailer 10
-
$5,328 CAD
View
Price last confirmed 39 days ago
B
Retailer 11
-
$5,328 CAD
View
Retailer 12
-
$5,328 CAD
View
Price last confirmed 12 days ago
B+
Retailer 13
-
$5,331 CAD
View
B+
Retailer 14
-
$5,532 CAD
View
B+
Retailer 15
-
$5,533 CAD
View
Retailer 16
-
$5,707 CAD
View
Price last confirmed 29 days ago
B+
Retailer 17
-
$6,127 CAD
View
Retailer 18
-
$6,148 CAD
View
Price last confirmed 39 days ago
B+
Retailer 19
-
$6,190 CAD
View
B
Retailer 20
-
$6,503 CAD
View
B
Retailer 21
-
$8,910 CAD
View
Retailer 22
-
$9,283 CAD
View
Price last confirmed 41 days ago
B
Retailer 23
-
$9,283 CAD
View
Most Expensive
B
Diamond Quarter
1.21SI1H25811F54N · Nov 5
$10,905 CAD
£6,148 GBP
View
23 more retailers have this diamond
Prices start from $3,986 CADSave up to $6,919 CAD

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
$3,986 CAD