Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1529068672

Certificate GIA 1529068672

Diamond specifications and retailer prices

From $2,827 AUD
$1,986 USD
As of October 31, 2026
Save $3,985 AUD (58%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $8,226 AUD at NZ Jewellers · As of October 3, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1529068672. Listed at 24 retailers as of October 29, 2026, with a 141% 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
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1529068672
Dimensions6.78 × 6.73 × 4.24 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Needle, Indented Natural, Natural
Top View
6.78 mm6.73 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1529068672
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.8%

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: $3,670 AUD|Low: $2,827 AUD|High: $7,853 AUD|Avg: $4,180 AUD|-1.5%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 8$2,827 AUD
Retailer 15$2,934 AUD
Retailer 10$2,990 AUD
Retailer 13$3,163 AUD
Retailer 6$3,166 AUD
Retailer 4$3,232 AUD
Retailer 2$3,234 AUD
Retailer 16$3,481 AUD
Retailer 1$3,670 AUD
Retailer 3$4,029 AUD
Retailer 5$4,029 AUD
Retailer 12$4,109 AUD
Retailer 7$4,157 AUD
Retailer 11$4,408 AUD
Retailer 17$4,535 AUD
Retailer 9$4,543 AUD
Retailer 18$4,732 AUD
Retailer 14$4,754 AUD
Retailer 19$6,812 AUD

24 data points across 19 retailers

24 retailers$2,827 AUD to $6,812 AUD

A
Cheapest Retailer
-
$2,827 AUD
$1,986 USD
A
Retailer 2
-
$2,934 AUD
HK$16,100 HKD
View
Retailer 3
-
$2,990 AUD
₹200,004 INR
View
Price last confirmed 16 days ago
A
Retailer 4
-
$3,163 AUD
$2,222 USD
View
B+
Retailer 5
-
$3,166 AUD
$2,224 USD
View
B+
Retailer 6
-
$3,232 AUD
$2,270 USD
View
B+
Retailer 7
-
$3,234 AUD
$2,272 USD
View
Final sale: no returns
B+
Retailer 8
-
$3,481 AUD
$2,445 USD
View
B+
Retailer 9
-
$3,670 AUD
£2,030 GBP
View
Retailer 10
-
$3,935 AUD
$2,764 USD
View
Price last confirmed 24 days ago
Retailer 11
-
$3,935 AUD
$2,764 USD
View
Price last confirmed 16 days ago
B
Retailer 12
-
$4,029 AUD
$2,830 USD
View
B
Retailer 13
-
$4,029 AUD
$2,830 USD
View
Retailer 14
-
$4,076 AUD
SGD 3,869 SGD
View
Price last confirmed 17 days ago
Retailer 15
-
$4,086 AUD
$2,870 USD
View
Price last confirmed 16 days ago
B+
Retailer 16
-
$4,109 AUD
£2,273 GBP
View
B
Retailer 17
-
$4,157 AUD
$2,920 USD
View
Retailer 18
-
$4,408 AUD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
$4,535 AUD
€3,034 EUR
View
Retailer 20
-
$4,540 AUD
$3,189 USD
View
Price last confirmed 23 days ago
B
Retailer 21
-
$4,732 AUD
$3,324 USD
View
B
Retailer 22
-
$4,754 AUD
ZAR 53,946 ZAR
View
B
Retailer 23
-
$6,812 AUD
£3,768 GBP
View
Most Expensive
NZ Jewellers
bf041d67-0ec4-4b79-bf90-36d06de6a248 · Oct 3
$8,226 AUD
$5,778 USD
View
Price last confirmed 29 days ago
23 more retailers have this diamond
Prices start from $2,827 AUDSave up to $3,985 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
$2,827 AUD