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Round|Natural|GIA

1.20ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1559002784

Certificate GIA 1559002784

Diamond specifications and retailer prices

From $5,141 AUD
As of November 6, 2026
Save $2,628 AUD (34%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,762 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559002784. Listed at 21 retailers as of November 6, 2026, with a 51% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559002784
Dimensions6.80 × 6.84 × 4.19 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Top View
6.80 mm6.84 mm1.20 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559002784
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.4%

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: $11,762 AUD|Low: $4,884 AUD|High: $11,762 AUD|Avg: $7,162 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 5, 2026
Retailer 9$5,141 AUD
Retailer 7$5,373 AUD
Retailer 4$6,085 AUD
Retailer 8$6,115 AUD
Retailer 10$6,115 AUD
Retailer 12$6,115 AUD
Retailer 11$7,057 AUD
Retailer 2$7,148 AUD
Retailer 5$7,328 AUD
Retailer 3$7,454 AUD
Retailer 6$10,809 AUD
NZ Jewellers$11,762 AUD

36 data points across 12 retailers

21 retailers$5,141 AUD to $7,770 AUD

A
Cheapest Retailer
-
$5,141 AUD
A
Retailer 2
-
$5,185 AUD
View
A
Retailer 3
-
$5,373 AUD
View
Final sale: no returns
A
Retailer 4
-
$5,394 AUD
View
B+
Retailer 5
-
$5,587 AUD
View
B+
Retailer 6
-
$5,773 AUD
View
Retailer 7
-
$6,085 AUD
View
Price last confirmed 7 days ago
Retailer 8
-
$6,115 AUD
View
Price last confirmed 8 days ago
Retailer 9
-
$6,115 AUD
View
Price last confirmed 8 days ago
B+
Retailer 10
-
$6,215 AUD
View
B+
Retailer 11
-
$6,660 AUD
View
Retailer 12
-
$6,885 AUD
View
Price last confirmed 7 days ago
Retailer 13
-
$6,885 AUD
View
Price last confirmed 7 days ago
Retailer 14
-
$7,057 AUD
View
Price last confirmed 10 days ago
Retailer 15
-
$7,114 AUD
View
Price last confirmed 7 days ago
B+
Retailer 16
-
$7,148 AUD
View
B+
Retailer 17
-
$7,328 AUD
View
Retailer 18
-
$7,454 AUD
View
Price last confirmed 14 days ago
B+
Retailer 19
-
$7,770 AUD
View
Retailer 20
-
$10,809 AUD
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
6b7cd258-3fcf-404a-9cec-684319f1aae3 · Oct 30
$11,762 AUD
$8,234 USD
View
Price last confirmed 7 days ago
20 more retailers have this diamond
Prices start from $5,141 AUDSave up to $2,628 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
$5,141 AUD