Round|Natural|GIA

1.20ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1548587129

Certificate GIA 1548587129

Diamond specifications and retailer prices

From $4,133 CAD
As of November 4, 2026
Save $3,640 CAD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,373 CAD at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct 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 1548587129. Listed at 22 retailers as of November 4, 2026, with a 88% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
H
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1548587129
Dimensions6.78 × 6.75 × 4.22 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Key to symbols
Crystal, Feather, Needle
Top View
6.78 mm6.75 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1548587129
Side View
Table 58.0%Crown 35.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.4%

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 4
Current: $6,077 CAD|Low: $4,133 CAD|High: $9,103 CAD|Avg: $5,730 CAD|+13.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 3$4,133 CAD
Retailer 8$4,163 CAD
Retailer 7$4,275 CAD
Retailer 6$5,761 CAD
Retailer 2$5,881 CAD
Retailer 1$6,077 CAD
Retailer 5$6,529 CAD
Retailer 4$9,043 CAD

42 data points across 8 retailers

22 retailers$4,133 CAD to $7,772 CAD

B+
Cheapest Retailer
-
$4,133 CAD
B+
Retailer 2
-
$4,163 CAD
View
B+
Retailer 3
-
$4,204 CAD
View
B+
Retailer 4
-
$4,275 CAD
View
Final sale: no returns
Retailer 5
-
$4,325 CAD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
$4,628 CAD
View
Retailer 7
-
$4,693 CAD
View
Price last confirmed 15 days ago
Retailer 8
-
$4,874 CAD
View
Price last confirmed 21 days ago
Retailer 9
-
$4,874 CAD
View
Price last confirmed 17 days ago
Retailer 10
-
$5,061 CAD
View
Price last confirmed 22 days ago
B
Retailer 11
-
$5,299 CAD
View
B
Retailer 12
-
$5,299 CAD
View
Retailer 13
-
$5,623 CAD
View
Price last confirmed 16 days ago
Retailer 14
-
$5,761 CAD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$5,881 CAD
View
B
Retailer 16
-
$6,077 CAD
View
Retailer 17
-
$6,089 CAD
View
Price last confirmed 22 days ago
B
Retailer 18
-
$6,324 CAD
View
Retailer 19
-
$6,529 CAD
View
Price last confirmed 20 days ago
B
Retailer 20
-
$7,772 CAD
View
Retailer 21
-
$9,043 CAD
View
Price last confirmed 16 days ago
Most Expensive
NZ Jewellers
0a40bb14-684d-41c6-873e-4e48ee2e3721 · Oct 20
$9,373 CAD
$6,711 USD
View
Price last confirmed 17 days ago
21 more retailers have this diamond
Prices start from $4,133 CADSave up to $3,640 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+
1.20ct Round
$4,133 CAD