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Round|Natural|GIA

1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6512424390

Certificate GIA 6512424390

Diamond specifications and retailer prices

From $5,385 CAD
As of November 5, 2026
Save $5,275 CAD (49%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $10,660 CAD at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6512424390. Listed at 17 retailers as of November 5, 2026, with prices from $5,385 to $10,660, a $5,275 spread on the same certified stone. NZ Jewellers lists it at $10,660. 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 angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 6512424390
Dimensions6.86 × 6.81 × 4.22 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Twinning Wisp, Feather, Needle, Indented Natural
Top View
6.86 mm6.81 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6512424390
Side View
Table 60.0%Crown 34.5°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: $6,159 CAD|Low: $4,707 CAD|High: $10,107 CAD|Avg: $6,496 CAD|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5$5,426 CAD
Retailer 2$5,554 CAD
Retailer 7$5,648 CAD
Retailer 9$5,815 CAD
Retailer 10$6,119 CAD
Retailer 1$6,159 CAD
Retailer 8$6,526 CAD
Retailer 4$6,878 CAD
Retailer 3$7,465 CAD
Retailer 6$9,987 CAD

45 data points across 10 retailers

17 retailers$5,385 CAD to $10,660 CAD

B+
Cheapest Retailer
-
$5,385 CAD
B+
Retailer 2
-
$5,426 CAD
View
B+
Retailer 3
-
$5,554 CAD
View
B+
Retailer 4
-
$5,648 CAD
View
Final sale: no returns
B+
Retailer 5
-
$5,803 CAD
View
Retailer 6
-
$6,119 CAD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$6,119 CAD
View
B
Retailer 8
-
$6,119 CAD
View
B+
Retailer 9
-
$6,159 CAD
View
B
Retailer 10
-
$6,325 CAD
View
Retailer 11
-
$6,526 CAD
View
Price last confirmed 28 days ago
B
Retailer 12
-
$6,878 CAD
View
B
Retailer 13
-
$7,060 CAD
View
B
Retailer 14
-
$7,465 CAD
View
B
Retailer 15
-
$9,722 CAD
View
B
Retailer 16
-
$9,987 CAD
View
Most Expensive
B
NZ Jewellers
26c924ad-4a91-43a5-8d77-a32aea1d223a · Nov 5
$10,660 CAD
$7,633 USD
View
16 more retailers have this diamond
Prices start from $5,385 CADSave up to $5,275 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.

B+
1.21ct Round
$5,385 CAD