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Radiant|Natural|GIA

1.31ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1559553399

Certificate GIA 1559553399

Diamond specifications and retailer prices

From €2,450 EUR
£2,164 GBP
As of November 2, 2026
Save €2,801 EUR (53%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €5,251 EUR at NZ Jewellers · As of October 30, 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1559553399. Listed at 8 retailers as of October 30, 2026, with prices from €2,450 to €5,251, a €2,801 spread on the same certified stone. NZ Jewellers lists it at €5,251. 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
I
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
Crown angle49.51°
Pavilion angle37.35°
OriginNatural
Grading LabGIA
CertificateGIA 1559553399
Dimensions7.23 × 5.57 × 3.76 mm
L/W Ratio1.30
Girdle conditionThick
Key to symbols
Crystal, Feather, Cloud
Top View
7.23 mm5.57 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 1559553399
Side View
Table 71.0%Crown 49.51°GirdlePavilion 37.35°CuletDepth 67.6%

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 2
Current: €5,251 EUR|Low: €2,450 EUR|High: €5,303 EUR|Avg: €3,223 EUR|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 2€2,450 EUR
Retailer 5€2,512 EUR
Retailer 6€2,528 EUR
Retailer 4€2,608 EUR
Retailer 7€2,612 EUR
Retailer 8€2,828 EUR
Retailer 9€3,018 EUR
Retailer 3€4,400 EUR
NZ Jewellers€5,251 EUR

37 data points across 9 retailers

8 retailers€2,450 EUR to €5,251 EUR

A
Cheapest Retailer
-
€2,450 EUR
£2,164 GBP
A
Retailer 2
-
€2,512 EUR
$2,817 USD
View
A
Retailer 3
-
€2,528 EUR
$2,835 USD
View
A
Retailer 4
-
€2,608 EUR
$2,925 USD
View
A
Retailer 5
-
€2,612 EUR
$2,930 USD
View
Retailer 6
-
€2,828 EUR
A$4,880 AUD
View
Price last confirmed 26 days ago
B
Retailer 7
-
€4,400 EUR
£3,886 GBP
View
Most Expensive
B
NZ Jewellers
12847545-be5a-4205-b170-7784169fc6de · Oct 30
€5,251 EUR
$5,889 USD
View
7 more retailers have this diamond
Prices start from €2,450 EURSave up to €2,801 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.

A
1.31ct Radiant
€2,450 EUR