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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 $4,884 NZD
£2,164 GBP
As of November 2, 2026
Save $5,583 NZD (53%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $10,467 NZD at NZ Jewellers · As of November 3, 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 November 2, 2026, with prices from $4,884 to $10,467, a $5,583 spread on the same certified stone. NZ Jewellers lists it at $10,467. 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
Colour
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $10,467 NZD|Low: $4,884 NZD|High: $10,571 NZD|Avg: $6,425 NZD|-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$4,884 NZD
Retailer 5$5,007 NZD
Retailer 6$5,039 NZD
Retailer 4$5,199 NZD
Retailer 7$5,207 NZD
Retailer 8$5,637 NZD
Retailer 9$6,016 NZD
Retailer 3$8,771 NZD
NZ Jewellers$10,467 NZD

37 data points across 9 retailers

8 retailers$4,884 NZD to $10,467 NZD

A
Cheapest Retailer
-
$4,884 NZD
£2,164 GBP
A
Retailer 2
-
$5,007 NZD
$2,817 USD
View
A
Retailer 3
-
$5,039 NZD
$2,835 USD
View
A
Retailer 4
-
$5,199 NZD
$2,925 USD
View
A
Retailer 5
-
$5,207 NZD
$2,930 USD
View
Retailer 6
-
$5,637 NZD
A$4,880 AUD
View
Price last confirmed 26 days ago
B
Retailer 7
-
$8,771 NZD
£3,886 GBP
View
Most Expensive
B
NZ Jewellers
12847545-be5a-4205-b170-7784169fc6de · Nov 3
$10,467 NZD
$5,889 USD
View
7 more retailers have this diamond
Prices start from $4,884 NZDSave up to $5,583 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.

A
1.31ct Radiant
$4,884 NZD