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Round|Natural|GIA

1.20ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 6565419637

Certificate GIA 6565419637

Diamond specifications and retailer prices

From $4,865 AUD
HK$26,700 HKD
As of October 31, 2026
Save $5,395 AUD (53%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $11,587 AUD at NZ Jewellers · As of October 23, 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 6565419637. Listed at 20 retailers as of October 26, 2026, with a 111% 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
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6565419637
Dimensions6.78 × 6.75 × 4.20 mm
L/W Ratio1.00
Girdle conditionFaceted
Top View
6.78 mm6.75 mm1.20 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6565419637
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.1%

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: $11,587 AUD|Low: $4,665 AUD|High: $11,587 AUD|Avg: $6,781 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
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 15$4,865 AUD
Retailer 19$5,040 AUD
Retailer 6$5,300 AUD
Retailer 16$5,318 AUD
Retailer 17$5,367 AUD
Retailer 13$5,440 AUD
Retailer 12$5,588 AUD
Retailer 2$5,766 AUD
Retailer 4$5,847 AUD
Retailer 7$5,927 AUD
Retailer 11$6,079 AUD
Retailer 18$6,088 AUD
Retailer 3$6,354 AUD
Retailer 5$6,395 AUD
Retailer 10$6,978 AUD
Retailer 14$8,145 AUD
Retailer 8$9,491 AUD
Retailer 9$10,260 AUD
NZ Jewellers$11,587 AUD

10 data points across 19 retailers

20 retailers$4,865 AUD to $10,260 AUD

A
Cheapest Retailer
-
$4,865 AUD
HK$26,700 HKD
A
Retailer 2
-
$5,040 AUD
$3,540 USD
View
Retailer 3
-
$5,300 AUD
€3,546 EUR
View
Price last confirmed 4 days ago
B+
Retailer 4
-
$5,318 AUD
$3,736 USD
View
B+
Retailer 5
-
$5,367 AUD
$3,770 USD
View
B+
Retailer 6
-
$5,440 AUD
$3,821 USD
View
Final sale: no returns
Retailer 7
-
$5,572 AUD
$3,914 USD
View
Price last confirmed 9 days ago
B+
Retailer 8
-
$5,588 AUD
View
B+
Retailer 9
-
$5,766 AUD
$4,050 USD
View
B+
Retailer 10
-
$5,847 AUD
$4,107 USD
View
B+
Retailer 11
-
$5,927 AUD
SGD 5,626 SGD
View
Retailer 12
-
$6,079 AUD
$4,270 USD
View
Price last confirmed 10 days ago
B+
Retailer 13
-
$6,088 AUD
£3,367 GBP
View
B+
Retailer 14
-
$6,354 AUD
$4,463 USD
View
B+
Retailer 15
-
$6,395 AUD
£3,537 GBP
View
Retailer 16
-
$6,978 AUD
$4,902 USD
View
Price last confirmed 9 days ago
B
Retailer 17
-
$8,145 AUD
ZAR 92,435 ZAR
View
B
Retailer 18
-
$9,491 AUD
$6,667 USD
View
B
Retailer 19
-
$10,260 AUD
£5,675 GBP
View
Most Expensive
NZ Jewellers
0bb5407c-ebf0-4ee2-9bd6-67360fc3be45 · Oct 23
$11,587 AUD
$8,139 USD
View
Price last confirmed 8 days ago
19 more retailers have this diamond
Prices start from $4,865 AUDSave up to $5,395 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
$4,865 AUD