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Radiant|Natural|GIA

1.31ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 3545917765

Certificate GIA 3545917765

Diamond specifications and retailer prices

From $4,440 AUD
£2,450 GBP
As of November 2, 2026
Save $3,173 AUD (42%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,855 AUD at NZ Jewellers · As of September 29, 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 3545917765. Listed at 13 retailers as of November 2, 2026, with a 71% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545917765
Dimensions5.43 × 7.01 × 3.80 mm
L/W Ratio1.29
Top View
5.43 mm7.01 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545917765
Side View
Table 70.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 70.0%

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: $4,440 AUD|Low: $4,085 AUD|High: $7,655 AUD|Avg: $5,294 AUD|+0.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 10$4,085 AUD
Retailer 1$4,440 AUD
Retailer 7$4,695 AUD
Retailer 8$4,695 AUD
Retailer 9$4,851 AUD
Retailer 2$5,080 AUD
Retailer 6$5,282 AUD
Retailer 3$5,328 AUD
Retailer 5$5,596 AUD
Retailer 4$7,613 AUD

31 data points across 10 retailers

13 retailers$4,440 AUD to $7,613 AUD

Retailer 1
-
$4,085 AUD
$2,863 USD
Price last confirmed 32 days ago
Retailer 2
-
$4,242 AUD
$2,973 USD
View
Price last confirmed 32 days ago
A
Retailer 3
-
$4,440 AUD
£2,450 GBP
View
A
Retailer 4
-
$4,695 AUD
$3,290 USD
View
A
Retailer 5
-
$4,695 AUD
$3,290 USD
View
Retailer 6
-
$4,713 AUD
$3,303 USD
View
Price last confirmed 31 days ago
A
Retailer 7
-
$4,754 AUD
$3,332 USD
View
A
Retailer 8
-
$4,851 AUD
$3,400 USD
View
A
Retailer 9
-
$5,080 AUD
$3,560 USD
View
B+
Retailer 10
-
$5,328 AUD
€3,556 EUR
View
B+
Retailer 11
-
$5,596 AUD
ZAR 63,352 ZAR
View
B
Retailer 12
-
$7,613 AUD
£4,201 GBP
View
Most Expensive
NZ Jewellers
2cef6053-688a-43d5-8d8e-521b14a6900e · Sep 29
$7,855 AUD
$5,505 USD
View
Price last confirmed 34 days ago
12 more retailers have this diamond
Prices start from $4,440 AUDSave up to $3,173 AUD

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
$4,440 AUD