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Round|Natural|GIA

1.20ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 1439457358

Certificate GIA 1439457358

Diamond specifications and retailer prices

From $3,678 AUD
As of November 4, 2026
Save $7,444 AUD (67%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,122 AUD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1439457358. Listed at 21 retailers as of November 4, 2026, with prices from $3,678 to $11,122, a $7,444 spread on the same certified stone. Diamond Quarter lists it at $11,122. 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
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1439457358
Dimensions6.79 × 6.75 × 4.25 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Top View
6.79 mm6.75 mm1.20 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1439457358
Side View
Table 56.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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 4
Current: $5,229 AUD|Low: $3,342 AUD|High: $8,114 AUD|Avg: $4,813 AUD|+1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 6$3,762 AUD
Retailer 9$3,764 AUD
Retailer 7$4,010 AUD
Retailer 3$4,343 AUD
Retailer 10$4,436 AUD
Retailer 8$4,510 AUD
Retailer 11$4,715 AUD
Retailer 4$4,932 AUD
Retailer 2$5,011 AUD
Retailer 1$5,229 AUD
Retailer 5$7,996 AUD

41 data points across 11 retailers

21 retailers$3,678 AUD to $11,122 AUD

A
Cheapest Retailer
-
$3,678 AUD
A
Retailer 2
-
$3,762 AUD
View
A
Retailer 3
-
$3,764 AUD
View
A
Retailer 4
-
$3,777 AUD
View
A
Retailer 5
-
$4,010 AUD
View
Final sale: no returns
A
Retailer 6
-
$4,010 AUD
View
Retailer 7
-
$4,343 AUD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$4,343 AUD
View
B+
Retailer 9
-
$4,436 AUD
View
B+
Retailer 10
-
$4,510 AUD
View
B+
Retailer 11
-
$4,715 AUD
View
B+
Retailer 12
-
$4,932 AUD
View
B+
Retailer 13
-
$4,934 AUD
View
B+
Retailer 14
-
$4,934 AUD
View
B+
Retailer 15
-
$5,011 AUD
View
B+
Retailer 16
-
$5,108 AUD
View
B+
Retailer 17
-
$5,229 AUD
View
Retailer 18
-
$5,560 AUD
View
Price last confirmed 14 days ago
B
Retailer 19
-
$7,996 AUD
View
B
Retailer 20
-
$8,353 AUD
View
Most Expensive
B
Diamond Quarter
1.2SI2H14589FD0N · Nov 5
$11,122 AUD
£6,017 GBP
View
20 more retailers have this diamond
Prices start from $3,678 AUDSave up to $7,444 AUD

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
1.20ct Round
$3,678 AUD