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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1498706583

Certificate GIA 1498706583

Diamond specifications and retailer prices

From $3,466 AUD
$2,435 USD
As of October 31, 2026
Save $4,207 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $7,673 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1498706583. Listed at 21 retailers as of October 30, 2026, with prices from $3,466 to $7,673, a $4,207 spread on the same certified stone. NZ Jewellers lists it at $7,673. 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
FluorescenceFaint
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1498706583
Dimensions6.74 × 6.78 × 4.22 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Top View
6.74 mm6.78 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1498706583
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $4,574 AUD|Low: $3,176 AUD|High: $7,454 AUD|Avg: $4,693 AUD|+2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9$3,466 AUD
Retailer 6$3,683 AUD
Retailer 5$3,748 AUD
Retailer 8$4,144 AUD
Retailer 1$4,574 AUD
Retailer 7$4,705 AUD
Retailer 3$4,863 AUD
Retailer 2$5,414 AUD
Retailer 4$7,405 AUD

42 data points across 9 retailers

21 retailers$3,466 AUD to $7,673 AUD

B+
Cheapest Retailer
-
$3,466 AUD
$2,435 USD
B+
Retailer 2
-
$3,471 AUD
$2,438 USD
View
B+
Retailer 3
-
$3,573 AUD
$2,510 USD
View
B+
Retailer 4
-
$3,683 AUD
$2,587 USD
View
Final sale: no returns
B+
Retailer 5
-
$3,748 AUD
$2,633 USD
View
B+
Retailer 6
-
$3,915 AUD
$2,750 USD
View
B+
Retailer 7
-
$3,990 AUD
$2,803 USD
View
B+
Retailer 8
-
$3,990 AUD
$2,803 USD
View
B
Retailer 9
-
$4,036 AUD
$2,835 USD
View
B
Retailer 10
-
$4,144 AUD
$2,911 USD
View
B
Retailer 11
-
$4,484 AUD
$3,150 USD
View
B
Retailer 12
-
$4,484 AUD
$3,150 USD
View
B+
Retailer 13
-
$4,574 AUD
£2,530 GBP
View
B
Retailer 14
-
$4,601 AUD
$3,232 USD
View
B
Retailer 15
-
$4,604 AUD
$3,234 USD
View
B
Retailer 16
-
$4,627 AUD
$3,250 USD
View
Retailer 17
-
$4,705 AUD
View
Price last confirmed 24 days ago
B
Retailer 18
-
$4,863 AUD
€3,253 EUR
View
B
Retailer 19
-
$5,414 AUD
ZAR 61,436 ZAR
View
B
Retailer 20
-
$7,405 AUD
£4,096 GBP
View
Most Expensive
B
NZ Jewellers
39fc103d-9290-4738-bcea-93388e39eadb · Oct 30
$7,673 AUD
$5,390 USD
View
20 more retailers have this diamond
Prices start from $3,466 AUDSave up to $4,207 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.

B+
1.20ct Round
$3,466 AUD