CaratHunter
Plans
Round|Natural|GIA

1.20ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1543161928

Certificate GIA 1543161928

Diamond specifications and retailer prices

From $4,428 AUD
HK$24,300 HKD
As of October 31, 2026
Save $6,007 AUD (58%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $10,435 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1543161928. Listed at 19 retailers as of October 30, 2026, with prices from $4,428 to $10,435, a $6,007 spread on the same certified stone. NZ Jewellers lists it at $10,435. 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
FluorescenceFaint
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1543161928
Dimensions6.76 × 6.72 × 4.23 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle, Cavity, Natural
Top View
6.76 mm6.72 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1543161928
Side View
Table 57.0%Crown 36.5°Girdle: THN-SLIPavilion 41°Culet: NoneDepth 62.7%

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: $10,435 AUD|Low: $4,392 AUD|High: $13,891 AUD|Avg: $7,599 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
October 31, 2026
Retailer 7$4,428 AUD
Retailer 12$5,270 AUD
Retailer 14$5,528 AUD
Retailer 3$5,666 AUD
Retailer 13$5,694 AUD
Retailer 4$5,772 AUD
Retailer 9$5,780 AUD
Retailer 6$5,989 AUD
Retailer 8$6,089 AUD
Retailer 10$6,676 AUD
Retailer 2$7,362 AUD
Retailer 11$10,031 AUD
NZ Jewellers$10,435 AUD
Retailer 5$13,891 AUD

39 data points across 14 retailers

19 retailers$4,428 AUD to $10,435 AUD

A
Cheapest Retailer
-
$4,428 AUD
HK$24,300 HKD
A
Retailer 2
-
$4,847 AUD
$3,405 USD
View
A
Retailer 3
-
$5,173 AUD
View
A
Retailer 4
-
$5,270 AUD
$3,702 USD
View
B+
Retailer 5
-
$5,528 AUD
$3,883 USD
View
Final sale: no returns
B+
Retailer 6
-
$5,585 AUD
SGD 5,302 SGD
View
B+
Retailer 7
-
$5,666 AUD
$3,980 USD
View
B+
Retailer 8
-
$5,694 AUD
$4,000 USD
View
B+
Retailer 9
-
$5,772 AUD
View
B+
Retailer 10
-
$5,780 AUD
£3,197 GBP
View
B+
Retailer 11
-
$5,989 AUD
$4,207 USD
View
B+
Retailer 12
-
$5,989 AUD
$4,207 USD
View
B+
Retailer 13
-
$6,089 AUD
£3,368 GBP
View
B+
Retailer 14
-
$6,200 AUD
$4,355 USD
View
B+
Retailer 15
-
$6,676 AUD
€4,466 EUR
View
B+
Retailer 16
-
$6,912 AUD
$4,855 USD
View
B+
Retailer 17
-
$7,362 AUD
ZAR 83,548 ZAR
View
B
Retailer 18
-
$10,031 AUD
£5,548 GBP
View
Most Expensive
B
NZ Jewellers
2cfba05b-86f4-4373-9dfc-8950396eabee · Oct 30
$10,435 AUD
$7,330 USD
View
18 more retailers have this diamond
Prices start from $4,428 AUDSave up to $6,007 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
$4,428 AUD