Radiant|Natural|GIA

1.20ct K SI1 Radiant Natural Diamond

ID • K/SI1 • GIA 3

Certificate GIA 3

Diamond specifications and retailer prices

From $2,897 USD
As of November 4, 2026
Save $765 USD (21%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $3,662 USD at Blue Nile · As of November 5, 2026
View at Blue Nile

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 3 retailers as of November 4, 2026, with prices from $2,897 to $3,662, a $765 spread on the same certified stone. Blue Nile lists it at $3,662. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3
Dimensions6.87 × 5.42 × 3.74 mm
L/W Ratio1.27
Top View
6.87 mm5.42 mm1.20 ctK / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 3
Side View
Table 69.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.0%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 4
Current: $3,662 USD|Low: $2,897 USD|High: $3,662 USD|Avg: $3,064 USD
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 3$2,897 USD
Retailer 2$2,932 USD
Blue Nile$3,662 USD

2 data points across 3 retailers

3 retailers$2,897 USD to $3,662 USD

B
Cheapest Retailer
-
$2,897 USD
B
Retailer 2
-
$2,932 USD
View
Most Expensive
B
Blue Nile
5631322 · Nov 5
$3,662 USD
View
2 more retailers have this diamond
Prices start from $2,897 USDSave up to $765 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.

B
1.20ct Radiant
$2,897 USD