Round|Natural|GIA

1.28ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2567115421

Certificate GIA 2567115421

Diamond specifications and retailer prices

From $5,706 CAD
SGD 5,520 SGD
As of October 31, 2026
Save $5,173 CAD (48%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $10,879 CAD at NZ Jewellers · As of October 30, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2567115421. Listed at 7 retailers as of October 30, 2026, with prices from $5,706 to $10,879, a $5,173 spread on the same certified stone. NZ Jewellers lists it at $10,879. 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
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2567115421
Dimensions6.98 × 6.99 × 4.29 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
6.98 mm6.99 mm1.28 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2567115421
Side View
Table 56.0%Crown 33°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.5%

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: Oct 31
Current: $10,879 CAD|Low: $5,283 CAD|High: $11,072 CAD|Avg: $7,187 CAD|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 5$5,706 CAD
Retailer 6$5,764 CAD
Retailer 2$6,349 CAD
Retailer 3$6,638 CAD
Retailer 7$6,661 CAD
Retailer 4$7,676 CAD
NZ Jewellers$10,879 CAD

44 data points across 7 retailers

7 retailers$5,706 CAD to $10,879 CAD

A
Cheapest Retailer
-
$5,706 CAD
SGD 5,520 SGD
A
Retailer 2
-
$5,764 CAD
$4,126 USD
View
Final sale: no returns
B+
Retailer 3
-
$6,349 CAD
£3,579 GBP
View
B+
Retailer 4
-
$6,638 CAD
€4,526 EUR
View
Retailer 5
-
$6,661 CAD
A$7,336 AUD
View
Price last confirmed 23 days ago
B+
Retailer 6
-
$7,676 CAD
ZAR 88,772 ZAR
View
Most Expensive
B
NZ Jewellers
1e68ce32-20b1-4386-8ff3-1d25582b57ad · Oct 30
$10,879 CAD
$7,788 USD
View
6 more retailers have this diamond
Prices start from $5,706 CADSave up to $5,173 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
$5,706 CAD