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Radiant|Natural|GIA

1.20ct K SI2 Radiant Natural Diamond

ID • K/SI2 • GIA 6551583038

Certificate GIA 6551583038

Diamond specifications and retailer prices

From $1,918 AUD
As of November 6, 2026
Save $2,486 AUD (56%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,327 AUD at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1.2ct natural radiant diamond

This 1.2ct natural radiant sits in the classic one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551583038. Listed at 13 retailers as of November 4, 2026, with a 130% 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
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6551583038
Dimensions7.21 × 5.07 × 3.54 mm
L/W Ratio1.42
Girdle conditionPolished
Top View
7.21 mm5.07 mm1.20 ctK / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551583038
Side View
Table 64.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 69.9%

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: $2,508 AUD|Low: $1,880 AUD|High: $4,618 AUD|Avg: $2,715 AUD|+3.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 2$1,918 AUD
Retailer 8$2,107 AUD
Retailer 9$2,113 AUD
Retailer 11$2,167 AUD
Retailer 7$2,218 AUD
Retailer 12$2,314 AUD
Retailer 3$2,506 AUD
Retailer 1$2,508 AUD
Retailer 4$2,627 AUD
Retailer 5$3,395 AUD
Retailer 10$3,825 AUD
Retailer 6$4,404 AUD

29 data points across 12 retailers

13 retailers$1,918 AUD to $4,404 AUD

A
Cheapest Retailer
-
$1,918 AUD
A
Retailer 2
-
$2,107 AUD
View
Final sale: no returns
A
Retailer 3
-
$2,113 AUD
View
A
Retailer 4
-
$2,167 AUD
View
A
Retailer 5
-
$2,218 AUD
View
A
Retailer 6
-
$2,314 AUD
View
A
Retailer 7
-
$2,506 AUD
View
A
Retailer 8
-
$2,508 AUD
View
B+
Retailer 9
-
$2,627 AUD
View
B+
Retailer 10
-
$3,395 AUD
View
B
Retailer 11
-
$3,825 AUD
View
B
Retailer 12
-
$4,404 AUD
View
Most Expensive
NZ Jewellers
79e7fcab-a612-41d7-8952-94b47f2762fb · Sep 30
$6,327 AUD
$4,347 USD
View
Price last confirmed 37 days ago
12 more retailers have this diamond
Prices start from $1,918 AUDSave up to $2,486 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 Radiant
$1,918 AUD