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Round|Natural|GIA

1.20ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5566280989

Certificate GIA 5566280989

Diamond specifications and retailer prices

From $3,280 AUD
HK$18,000 HKD
As of October 31, 2026
Save $3,993 AUD (55%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $7,578 AUD at NZ Jewellers · As of October 17, 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 G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5566280989. Listed at 19 retailers as of October 31, 2026, with a 122% 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5566280989
Dimensions6.76 × 6.73 × 4.27 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Indented Natural, Natural
Top View
6.76 mm6.73 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5566280989
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 63.3%

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: Oct 31
Current: $7,273 AUD|Low: $3,280 AUD|High: $7,362 AUD|Avg: $4,557 AUD|-0.9%
Retailer 1
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 1, 2026
Retailer 9$3,280 AUD
Retailer 7$3,443 AUD
Retailer 12$3,800 AUD
Retailer 13$4,015 AUD
Retailer 10$4,057 AUD
Retailer 5$4,236 AUD
Retailer 2$4,349 AUD
Retailer 4$4,349 AUD
Retailer 6$4,512 AUD
Retailer 3$4,647 AUD
Retailer 11$5,093 AUD
Retailer 8$5,346 AUD
Retailer 1$7,273 AUD

34 data points across 13 retailers

19 retailers$3,280 AUD to $7,273 AUD

A
Cheapest Retailer
-
$3,280 AUD
HK$18,000 HKD
A
Retailer 2
-
$3,443 AUD
₹230,331 INR
View
A
Retailer 3
-
$3,800 AUD
SGD 3,607 SGD
View
A
Retailer 4
-
$3,904 AUD
$2,742 USD
View
A
Retailer 5
-
$4,015 AUD
$2,820 USD
View
Final sale: no returns
A
Retailer 6
-
$4,057 AUD
$2,850 USD
View
A
Retailer 7
-
$4,057 AUD
$2,850 USD
View
Retailer 8
-
$4,236 AUD
£2,343 GBP
View
Price last confirmed 32 days ago
Retailer 9
-
$4,349 AUD
$3,055 USD
View
Price last confirmed 12 days ago
Retailer 10
-
$4,349 AUD
$3,055 USD
View
Price last confirmed 16 days ago
A
Retailer 11
-
$4,512 AUD
£2,496 GBP
View
Retailer 12
-
$4,517 AUD
$3,173 USD
View
Price last confirmed 16 days ago
B+
Retailer 13
-
$4,557 AUD
SGD 4,326 SGD
View
Retailer 14
-
$4,647 AUD
View
Price last confirmed 24 days ago
Retailer 15
-
$5,018 AUD
$3,525 USD
View
Price last confirmed 13 days ago
B+
Retailer 16
-
$5,093 AUD
€3,407 EUR
View
B+
Retailer 17
-
$5,346 AUD
ZAR 60,669 ZAR
View
B
Retailer 18
-
$7,273 AUD
£4,023 GBP
View
Most Expensive
NZ Jewellers
cc253d74-bfa1-436e-a15f-ccc07b422e88 · Oct 17
$7,578 AUD
$5,323 USD
View
Price last confirmed 14 days ago
18 more retailers have this diamond
Prices start from $3,280 AUDSave up to $3,993 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
$3,280 AUD