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Radiant|Natural|GIA

1.20ct K SI1 Radiant Natural Diamond

ID • K/SI1 • GIA 3

Certificate GIA 3

Diamond specifications and retailer prices

From $5,226 NZD
As of November 4, 2026
Save $1,380 NZD (21%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: $6,606 NZD 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 $5,226 to $6,606, a $1,380 spread on the same certified stone. Blue Nile lists it at $6,606. 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
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: $6,606 NZD|Low: $5,226 NZD|High: $6,606 NZD|Avg: $5,527 NZD
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 3$5,226 NZD
Retailer 2$5,289 NZD
Blue Nile$6,606 NZD

2 data points across 3 retailers

3 retailers$5,226 NZD to $6,606 NZD

B
Cheapest Retailer
-
$5,226 NZD
B
Retailer 2
-
$5,289 NZD
View
Most Expensive
B
Blue Nile
5631322 · Nov 5
$6,606 NZD
$3,662 USD
View
2 more retailers have this diamond
Prices start from $5,226 NZDSave up to $1,380 NZD

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
$5,226 NZD