Radiant|Natural|GIA

1.31ct K SI1 Radiant Natural Diamond

ID • K/SI1 • GIA 11

Certificate GIA 11

Diamond specifications and retailer prices

From $2,427 USD
As of November 4, 2026
Save $3,087 USD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $5,514 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.31ct natural radiant diamond

This 1.31ct 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 8 retailers as of November 4, 2026, with prices from $2,427 to $5,514, a $3,087 spread on the same certified stone. NZ Jewellers lists it at $5,514. 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

1.31
Carat
K
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 11
Dimensions7.33 × 5.49 × 3.75 mm
L/W Ratio1.34
Top View
7.33 mm5.49 mm1.31 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 11
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: $5,514 USD|Low: $2,427 USD|High: $5,514 USD|Avg: $3,220 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
September 30, 2026
Retailer 8$2,427 USD
Retailer 4$2,498 USD
Retailer 5$2,867 USD
Retailer 6$2,867 USD
Retailer 2$2,978 USD
Retailer 3$3,099 USD
Retailer 7$3,308 USD
NZ Jewellers$5,514 USD

3 data points across 8 retailers

8 retailers$2,427 USD to $5,514 USD

A
Cheapest Retailer
-
$2,427 USD
A
Retailer 2
-
$2,498 USD
View
Retailer 3
-
$2,867 USD
View
Price last confirmed 9 days ago
A
Retailer 4
-
$2,867 USD
View
A
Retailer 5
-
$2,978 USD
View
B+
Retailer 6
-
$3,099 USD
View
B+
Retailer 7
-
$3,308 USD
View
Most Expensive
B
NZ Jewellers
cb41615b-a6f8-4181-bfe7-05febe830fb7 · Nov 5
$5,514 USD
View
7 more retailers have this diamond
Prices start from $2,427 USDSave up to $3,087 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
1.31ct Radiant
$2,427 USD