Round|Natural|GIA

1.30ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 5556390031

Certificate GIA 5556390031

Diamond specifications and retailer prices

From $4,910 AUD
As of November 4, 2026
Save $2,061 AUD (30%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: $11,474 AUD at NZ Jewellers · As of September 10, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5556390031. Listed at 24 retailers as of November 4, 2026, with a 42% 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
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle31.5°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 5556390031
Dimensions7.03 × 7.07 × 4.32 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
7.03 mm7.07 mm1.30 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 5556390031
Side View
Table 59.0%Crown 31.5°Girdle: THN-STKPavilion 41.8°Culet: NoneDepth 61.2%

Caratlytics Score

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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: $11,044 AUD|Low: $4,331 AUD|High: $11,044 AUD|Avg: $6,485 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
November 5, 2026
Retailer 9$4,875 AUD
Retailer 8$4,910 AUD
Retailer 6$4,953 AUD
Retailer 16$5,000 AUD
Retailer 5$5,054 AUD
Retailer 7$5,300 AUD
Retailer 19$5,478 AUD
Retailer 3$5,743 AUD
Retailer 12$5,743 AUD
Retailer 18$5,743 AUD
Retailer 11$5,834 AUD
Retailer 10$6,133 AUD
Retailer 21$6,251 AUD
Retailer 13$6,405 AUD
Retailer 4$6,627 AUD
Retailer 14$6,638 AUD
Retailer 2$6,971 AUD
Retailer 15$7,718 AUD
Retailer 20$9,167 AUD
Retailer 17$10,149 AUD
NZ Jewellers$11,044 AUD

39 data points across 21 retailers

24 retailers$4,910 AUD to $6,971 AUD

Retailer 1
-
$4,875 AUD
Price last confirmed 9 days ago
A
Retailer 2
-
$4,910 AUD
View
Retailer 3
-
$4,953 AUD
View
Price last confirmed 10 days ago
Retailer 4
-
$5,000 AUD
View
Price last confirmed 8 days ago
Retailer 5
-
$5,054 AUD
View
Price last confirmed 9 days ago
A
Retailer 6
-
$5,253 AUD
View
Retailer 7
-
$5,478 AUD
View
Price last confirmed 9 days ago
Retailer 8
-
$5,743 AUD
View
Price last confirmed 11 days ago
Retailer 9
-
$5,743 AUD
View
Price last confirmed 12 days ago
Retailer 10
-
$5,743 AUD
View
Price last confirmed 12 days ago
Retailer 11
-
$5,834 AUD
View
Price last confirmed 14 days ago
Retailer 12
-
$5,967 AUD
View
Price last confirmed 56 days ago
Retailer 13
-
$6,133 AUD
View
Price last confirmed 10 days ago
Retailer 14
-
$6,251 AUD
View
Price last confirmed 8 days ago
Retailer 15
-
$6,405 AUD
View
Price last confirmed 9 days ago
Retailer 16
-
$6,627 AUD
View
Price last confirmed 10 days ago
Retailer 17
-
$6,638 AUD
View
Price last confirmed 28 days ago
Retailer 18
-
$6,884 AUD
View
Price last confirmed 56 days ago
A
Retailer 19
-
$6,971 AUD
View
Retailer 20
-
$7,718 AUD
View
Price last confirmed 10 days ago
Retailer 21
-
$9,167 AUD
View
Price last confirmed 11 days ago
Retailer 22
-
$10,149 AUD
View
Price last confirmed 20 days ago
Retailer 23
-
$11,044 AUD
View
Price last confirmed 10 days ago
Most Expensive
NZ Jewellers
e517ba02-28b9-4889-ae77-714b4f2529f1 · Sep 10
$11,474 AUD
$8,032 USD
View
Price last confirmed 56 days ago
23 more retailers have this diamond
Prices start from $4,910 AUDSave up to $2,061 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
$4,910 AUD