CaratHunter
Plans
Radiant|Natural|GIA

1.31ct K SI2 Radiant Natural Diamond

EX • K/SI2 • GIA 7551497552

Certificate GIA 7551497552

Diamond specifications and retailer prices

From $3,090 AUD
As of November 6, 2026
Save $2,203 AUD (42%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,316 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 7551497552. Listed at 10 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
K
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 7551497552
Dimensions7.21 × 5.31 × 3.75 mm
L/W Ratio1.36
Girdle conditionPolished
Culet sizeNone
Key to symbols
Crystal, Pinpoint
Top View
7.21 mm5.31 mm1.31 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 7551497552
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 70.6%

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 6
Current: $3,282 AUD|Low: $3,021 AUD|High: $5,357 AUD|Avg: $3,873 AUD|+1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 7, 2026
Retailer 5$3,021 AUD
Retailer 2$3,090 AUD
Retailer 1$3,282 AUD
Retailer 3$4,104 AUD
Retailer 4$5,293 AUD

41 data points across 5 retailers

10 retailers$3,090 AUD to $5,293 AUD

Retailer 1
-
$3,021 AUD
Price last confirmed 30 days ago
Retailer 2
-
$3,021 AUD
View
Price last confirmed 30 days ago
Retailer 3
-
$3,021 AUD
View
Price last confirmed 13 days ago
A
Retailer 4
-
$3,090 AUD
View
Retailer 5
-
$3,161 AUD
View
Price last confirmed 38 days ago
A
Retailer 6
-
$3,282 AUD
View
Retailer 7
-
$3,487 AUD
View
Price last confirmed 39 days ago
A
Retailer 8
-
$4,104 AUD
View
B+
Retailer 9
-
$5,293 AUD
View
Most Expensive
NZ Jewellers
30c1e1ec-4b8e-4a8d-a852-c29f55ab6974 · Sep 29
$6,316 AUD
$4,340 USD
View
Price last confirmed 38 days ago
9 more retailers have this diamond
Prices start from $3,090 AUDSave up to $2,203 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
$3,090 AUD