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Round|Natural|GIA

1.30ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2528810151

Certificate GIA 2528810151

Diamond specifications and retailer prices

From $3,821 AUD
As of November 4, 2026
Save $4,538 AUD (54%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $8,732 AUD at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.3ct natural round diamond

This 1.3ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2528810151. Listed at 18 retailers as of November 4, 2026, with a 119% 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

1.30
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceVery Strong
Crown angle33°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2528810151
Dimensions6.97 × 7.00 × 4.31 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.97 mm7.00 mm1.30 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceVery Strong
CertificateGIA 2528810151
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.7%

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 4
Current: $5,313 AUD|Low: $3,821 AUD|High: $8,570 AUD|Avg: $5,278 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 10$3,821 AUD
Retailer 7$3,991 AUD
Retailer 8$4,453 AUD
Retailer 2$4,627 AUD
Retailer 6$4,793 AUD
Retailer 11$5,013 AUD
Retailer 4$5,155 AUD
Retailer 1$5,313 AUD
Retailer 3$5,424 AUD
Retailer 5$5,823 AUD
Retailer 9$8,360 AUD

30 data points across 11 retailers

18 retailers$3,821 AUD to $8,360 AUD

A
Cheapest Retailer
-
$3,821 AUD
A
Retailer 2
-
$3,991 AUD
View
A
Retailer 3
-
$4,453 AUD
View
A
Retailer 4
-
$4,554 AUD
View
A
Retailer 5
-
$4,627 AUD
View
Final sale: no returns
A
Retailer 6
-
$4,687 AUD
View
A
Retailer 7
-
$4,693 AUD
View
A
Retailer 8
-
$4,793 AUD
View
Retailer 9
-
$5,013 AUD
View
Price last confirmed 17 days ago
Retailer 10
-
$5,013 AUD
View
Price last confirmed 21 days ago
A
Retailer 11
-
$5,155 AUD
View
Retailer 12
-
$5,205 AUD
View
Price last confirmed 22 days ago
A
Retailer 13
-
$5,313 AUD
View
Retailer 14
-
$5,424 AUD
View
Price last confirmed 29 days ago
Retailer 15
-
$5,784 AUD
View
Price last confirmed 19 days ago
A
Retailer 16
-
$5,823 AUD
View
B
Retailer 17
-
$8,360 AUD
View
Most Expensive
NZ Jewellers
850537c0-77a6-497c-ab10-3d486638b5d1 · Oct 17
$8,732 AUD
$6,113 USD
View
Price last confirmed 19 days ago
17 more retailers have this diamond
Prices start from $3,821 AUDSave up to $4,538 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
1.30ct Round
$3,821 AUD