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Round|Natural|GIA

1.20ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 6405211720

Certificate GIA 6405211720

Diamond specifications and retailer prices

From $2,997 AUD
As of November 5, 2026
Save $1,171 AUD (28%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,168 AUD at B2C Jewels · As of November 4, 2026
View at B2C Jewels

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6405211720. Listed at 4 retailers as of November 4, 2026, with prices from $2,997 to $4,168, a $1,171 spread on the same certified stone. B2C Jewels lists it at $4,168. 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
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6405211720
Dimensions6.78 × 6.81 × 4.23 mm
L/W Ratio1.00
Star length50%
Top View
6.78 mm6.81 mm1.20 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6405211720
Side View
Table 56.0%Crown 36.5°Girdle: MED-MEDPavilion 40.6°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: $4,168 AUD|Low: $2,997 AUD|High: $4,763 AUD|Avg: $3,937 AUD|+5.0%
B2C Jewels
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 3$2,997 AUD
Retailer 2$3,174 AUD
B2C Jewels$4,168 AUD
Retailer 4$4,763 AUD

43 data points across 4 retailers

4 retailers$2,997 AUD to $4,168 AUD

A
Cheapest Retailer
-
$2,997 AUD
A
Retailer 2
-
$3,174 AUD
View
Final sale: no returns
A
Retailer 3
-
$3,870 AUD
View
Most Expensive
A
B2C Jewels
30815270 · Nov 4
$4,168 AUD
$2,918 USD
View
3 more retailers have this diamond
Prices start from $2,997 AUDSave up to $1,171 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
$2,997 AUD