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Radiant|Natural|GIA

1.20ct D SI1 Radiant Natural Diamond

VG • D/SI1 • GIA 1555638026

Certificate GIA 1555638026

Diamond specifications and retailer prices

From $4,649 AUD
As of November 4, 2026
Save $4,194 AUD (47%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $8,843 AUD at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 1555638026. Listed at 13 retailers as of November 4, 2026, with prices from $4,649 to $8,843, a $4,194 spread on the same certified stone. Helzberg Diamonds lists it at $8,843. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
D
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555638026
Dimensions6.94 × 5.34 × 3.65 mm
L/W Ratio1.30
Culet sizeNone
Top View
6.94 mm5.34 mm1.20 ctD / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555638026
Side View
Table 68.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.3%

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: $8,843 AUD|Low: $4,649 AUD|High: $8,843 AUD|Avg: $5,984 AUD|+4.0%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 7, 2026
Retailer 9$4,649 AUD
Retailer 11$4,727 AUD
Retailer 6$4,762 AUD
Retailer 10$4,969 AUD
Retailer 2$5,369 AUD
Retailer 4$5,600 AUD
Retailer 13$5,932 AUD
Retailer 3$6,020 AUD
Retailer 8$6,199 AUD
Retailer 7$6,450 AUD
Retailer 12$7,842 AUD
Retailer 5$8,414 AUD
Helzberg Diamonds$8,843 AUD

38 data points across 13 retailers

13 retailers$4,649 AUD to $8,843 AUD

A
Cheapest Retailer
-
$4,649 AUD
A
Retailer 2
-
$4,727 AUD
View
A
Retailer 3
-
$4,762 AUD
View
B+
Retailer 4
-
$4,969 AUD
View
B+
Retailer 5
-
$5,369 AUD
View
B+
Retailer 6
-
$5,600 AUD
View
B+
Retailer 7
-
$5,932 AUD
View
B+
Retailer 8
-
$6,020 AUD
View
B+
Retailer 9
-
$6,199 AUD
View
B+
Retailer 10
-
$6,450 AUD
View
B
Retailer 11
-
$7,842 AUD
View
B
Retailer 12
-
$8,414 AUD
View
Most Expensive
B
Helzberg Diamonds
XZRHLLLMJOGIM · Nov 4
$8,843 AUD
$6,076 USD
View
12 more retailers have this diamond
Prices start from $4,649 AUDSave up to $4,194 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 Radiant
$4,649 AUD