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1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1242104470

Certificate GIA 1242104470

Diamond specifications and retailer prices

From $4,619 AUD
As of November 6, 2026
Save $5,439 AUD (54%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $10,059 AUD at MOH London · As of November 1, 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1242104470. Listed at 7 retailers as of November 1, 2026, with prices from $4,619 to $10,059, a $5,439 spread on the same certified stone. MOH London lists it at $10,059. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1242104470
Dimensions6.71 × 6.76 × 4.21 mm
L/W Ratio1.01
Key to symbols
Crystal, Pinpoint
Top View
6.71 mm6.76 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1242104470
Side View
Table 59.0%CrownGirdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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: $10,059 AUD|Low: $4,619 AUD|High: $10,059 AUD|Avg: $6,242 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$4,619 AUD
Retailer 4$5,302 AUD
Retailer 7$5,573 AUD
Retailer 3$5,827 AUD
Retailer 2$5,982 AUD
Retailer 6$6,950 AUD
MOH London$10,059 AUD

8 data points across 7 retailers

7 retailers$4,619 AUD to $10,059 AUD

A
Cheapest Retailer
-
$4,619 AUD
A
Retailer 2
-
$5,302 AUD
View
B+
Retailer 3
-
$5,573 AUD
View
B+
Retailer 4
-
$5,827 AUD
View
B+
Retailer 5
-
$5,982 AUD
View
B+
Retailer 6
-
$6,950 AUD
View
Most Expensive
B
MOH London
49913240E · Nov 1
$10,059 AUD
£5,442 GBP
View
6 more retailers have this diamond
Prices start from $4,619 AUDSave up to $5,439 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
$4,619 AUD