Radiant|Natural|GIA

1.20ct K SI2 Radiant Natural Diamond

ID • K/SI2 • GIA 6551583038

Certificate GIA 6551583038

Diamond specifications and retailer prices

From $1,318 USD
As of November 6, 2026
Save $1,708 USD (56%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,347 USD 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
Color
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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,723 USD|Low: $1,292 USD|High: $3,173 USD|Avg: $1,866 USD|+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$1,318 USD
Retailer 8$1,448 USD
Retailer 9$1,452 USD
Retailer 11$1,489 USD
Retailer 7$1,524 USD
Retailer 12$1,590 USD
Retailer 3$1,722 USD
Retailer 1$1,723 USD
Retailer 4$1,805 USD
Retailer 5$2,333 USD
Retailer 10$2,628 USD
Retailer 6$3,026 USD

29 data points across 12 retailers

13 retailers$1,318 USD to $3,026 USD

A
Cheapest Retailer
-
$1,318 USD
A
Retailer 2
-
$1,448 USD
View
Final sale: no returns
A
Retailer 3
-
$1,452 USD
View
A
Retailer 4
-
$1,489 USD
View
A
Retailer 5
-
$1,524 USD
View
A
Retailer 6
-
$1,590 USD
View
A
Retailer 7
-
$1,722 USD
View
A
Retailer 8
-
$1,723 USD
View
B+
Retailer 9
-
$1,805 USD
View
B+
Retailer 10
-
$2,333 USD
View
B
Retailer 11
-
$2,628 USD
View
B
Retailer 12
-
$3,026 USD
View
Most Expensive
NZ Jewellers
79e7fcab-a612-41d7-8952-94b47f2762fb · Sep 30
$4,347 USD
View
Price last confirmed 37 days ago
12 more retailers have this diamond
Prices start from $1,318 USDSave up to $1,708 USD

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
$1,318 USD