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Round|Natural|GIA

1.28ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 3555600029

Certificate GIA 3555600029

Diamond specifications and retailer prices

From $3,714 CAD
As of November 6, 2026
Save $4,966 CAD (57%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,680 CAD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555600029. Listed at 21 retailers as of November 5, 2026, with prices from $3,714 to $8,680, a $4,966 spread on the same certified stone. NZ Jewellers lists it at $8,680. 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

1.28
Carat
I
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 3555600029
Dimensions6.94 × 6.97 × 4.27 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle, Indented Natural
Top View
6.94 mm6.97 mm1.28 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555600029
Side View
Table 58.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $3,714 CAD|Low: $3,714 CAD|High: $8,419 CAD|Avg: $5,349 CAD|-2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$3,714 CAD
Retailer 7$3,718 CAD
Retailer 9$4,281 CAD
Retailer 2$4,767 CAD
Retailer 3$5,124 CAD
Retailer 8$5,314 CAD
Retailer 4$5,788 CAD
Retailer 5$6,081 CAD
Retailer 6$8,308 CAD

26 data points across 9 retailers

21 retailers$3,714 CAD to $8,680 CAD

A
Cheapest Retailer
-
$3,714 CAD
A
Retailer 2
-
$3,718 CAD
View
A
Retailer 3
-
$4,281 CAD
View
A
Retailer 4
-
$4,423 CAD
View
A
Retailer 5
-
$4,598 CAD
View
Final sale: no returns
A
Retailer 6
-
$4,767 CAD
View
A
Retailer 7
-
$4,790 CAD
View
Retailer 8
-
$4,982 CAD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$4,982 CAD
View
A
Retailer 10
-
$5,124 CAD
View
B+
Retailer 11
-
$5,172 CAD
View
B+
Retailer 12
-
$5,173 CAD
View
B+
Retailer 13
-
$5,184 CAD
View
B+
Retailer 14
-
$5,314 CAD
View
Retailer 15
-
$5,335 CAD
View
Price last confirmed 29 days ago
B+
Retailer 16
-
$5,748 CAD
View
B+
Retailer 17
-
$5,788 CAD
View
B+
Retailer 18
-
$6,081 CAD
View
B
Retailer 19
-
$8,308 CAD
View
Retailer 20
-
$8,461 CAD
View
Price last confirmed 66 days ago
Most Expensive
B
NZ Jewellers
3a3018ef-e528-4962-97d6-8518516e0f75 · Nov 5
$8,680 CAD
$6,215 USD
View
20 more retailers have this diamond
Prices start from $3,714 CADSave up to $4,966 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
1.28ct Round
$3,714 CAD