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Radiant|Natural|GIA

1.30ct K SI1 Radiant Natural Diamond

ID • K/SI1 • GIA 4

Certificate GIA 4

Diamond specifications and retailer prices

From €3,105 EUR
As of November 4, 2026
Save €781 EUR (20%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: €3,886 EUR at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 1.3ct natural radiant diamond

This 1.3ct natural radiant sits in the one-and-a-quarter to one-and-a-half 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 €3,105 to €3,886, a €781 spread on the same certified stone. Blue Nile lists it at €3,886. 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

1.30
Carat
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 4
Dimensions7.07 × 5.85 × 3.79 mm
L/W Ratio1.21
Top View
7.07 mm5.85 mm1.30 ctK / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 4
Side View
Table 70.0%CrownGirdle: MED-ETKPavilionCulet: NoneDepth 64.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 4
Current: €3,886 EUR|Low: €3,105 EUR|High: €3,886 EUR|Avg: €3,262 EUR
Blue Nile
Retailer 2
Retailer 3
September 26, 2026
Retailer 3€3,105 EUR
Retailer 2€3,106 EUR
Blue Nile€3,886 EUR

2 data points across 3 retailers

3 retailers€3,105 EUR to €3,886 EUR

B+
Cheapest Retailer
-
€3,105 EUR
B+
Retailer 2
-
€3,106 EUR
View
Most Expensive
B
Blue Nile
5631297 · Nov 5
€3,886 EUR
$4,339 USD
View
2 more retailers have this diamond
Prices start from €3,105 EURSave up to €781 EUR

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+
1.30ct Radiant
€3,105 EUR