CaratHunter
Plans
Round|Natural|GIA

1.20ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1557218523

Certificate GIA 1557218523

Diamond specifications and retailer prices

From $2,869 AUD
As of November 6, 2026
Save $3,790 AUD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,967 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1557218523. Listed at 20 retailers as of November 4, 2026, with a 132% 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1557218523
Dimensions6.77 × 6.80 × 4.26 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Indented Natural
Top View
6.77 mm6.80 mm1.20 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1557218523
Side View
Table 57.0%Crown 36°Girdle: THN-MEDPavilion 41°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: Nov 6
Current: $4,749 AUD|Low: $2,869 AUD|High: $6,747 AUD|Avg: $4,194 AUD|+0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 9$2,869 AUD
Retailer 2$2,972 AUD
Retailer 7$3,342 AUD
Retailer 3$3,646 AUD
Retailer 4$3,985 AUD
Retailer 5$4,008 AUD
Retailer 6$4,651 AUD
Retailer 1$4,749 AUD
Retailer 8$6,658 AUD

27 data points across 9 retailers

20 retailers$2,869 AUD to $6,658 AUD

A
Cheapest Retailer
-
$2,869 AUD
A
Retailer 2
-
$2,972 AUD
View
B+
Retailer 3
-
$3,342 AUD
View
B+
Retailer 4
-
$3,548 AUD
View
B+
Retailer 5
-
$3,551 AUD
View
B+
Retailer 6
-
$3,551 AUD
View
B+
Retailer 7
-
$3,646 AUD
View
Retailer 8
-
$3,810 AUD
View
Price last confirmed 39 days ago
Retailer 9
-
$3,810 AUD
View
Price last confirmed 25 days ago
B+
Retailer 10
-
$3,900 AUD
View
Retailer 11
-
$3,957 AUD
View
Price last confirmed 38 days ago
B
Retailer 12
-
$3,985 AUD
View
B+
Retailer 13
-
$4,008 AUD
View
B
Retailer 14
-
$4,015 AUD
View
Retailer 15
-
$4,397 AUD
View
Price last confirmed 38 days ago
B
Retailer 16
-
$4,651 AUD
View
B
Retailer 17
-
$4,749 AUD
View
B
Retailer 18
-
$6,658 AUD
View
Retailer 19
-
$7,967 AUD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
91146f89-0f16-4898-9c1f-0dc4da1ab6cd · Oct 3
$7,967 AUD
$5,474 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from $2,869 AUDSave up to $3,790 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
$2,869 AUD