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Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2566304544

Certificate GIA 2566304544

Diamond specifications and retailer prices

From $2,956 AUD
As of November 6, 2026
Save $4,267 AUD (59%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,223 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566304544. Listed at 12 retailers as of November 4, 2026, with prices from $2,956 to $7,223, a $4,267 spread on the same certified stone. MOH London lists it at $7,223. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566304544
Dimensions6.73 × 6.78 × 4.25 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity
Top View
6.73 mm6.78 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566304544
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.9%

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: $7,223 AUD|Low: $2,956 AUD|High: $7,283 AUD|Avg: $4,561 AUD|-0.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 4$2,956 AUD
Retailer 3$3,345 AUD
Retailer 2$3,556 AUD
Retailer 5$3,799 AUD
Retailer 10$4,053 AUD
Retailer 6$4,174 AUD
Retailer 7$4,176 AUD
Retailer 8$4,630 AUD
Retailer 9$5,046 AUD
MOH London$7,223 AUD

27 data points across 10 retailers

12 retailers$2,956 AUD to $7,223 AUD

A
Cheapest Retailer
-
$2,956 AUD
A
Retailer 2
-
$3,345 AUD
View
A
Retailer 3
-
$3,556 AUD
View
A
Retailer 4
-
$3,799 AUD
View
B+
Retailer 5
-
$4,053 AUD
View
B+
Retailer 6
-
$4,174 AUD
View
A
Retailer 7
-
$4,176 AUD
View
B+
Retailer 8
-
$4,206 AUD
View
B+
Retailer 9
-
$4,630 AUD
View
Retailer 10
-
$4,631 AUD
View
Price last confirmed 31 days ago
B+
Retailer 11
-
$5,046 AUD
View
Most Expensive
B
MOH London
299C4EEEE · Nov 4
$7,223 AUD
£3,908 GBP
View
11 more retailers have this diamond
Prices start from $2,956 AUDSave up to $4,267 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
$2,956 AUD