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Round|Natural|GIA

1.30ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 6551678903

Certificate GIA 6551678903

Diamond specifications and retailer prices

From $4,771 AUD
As of November 4, 2026
Save $5,598 AUD (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,644 AUD at NZ Jewellers · As of September 25, 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 6551678903. Listed at 17 retailers as of November 4, 2026, with a 117% 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
FluorescenceMedium
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551678903
Dimensions6.98 × 6.93 × 4.33 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.98 mm6.93 mm1.30 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551678903
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.2%

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 4
Current: $6,011 AUD|Low: $4,735 AUD|High: $10,621 AUD|Avg: $6,617 AUD|-2.2%
Retailer 1
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
November 6, 2026
Retailer 3$4,771 AUD
Retailer 12$5,050 AUD
Retailer 11$5,261 AUD
Retailer 10$5,410 AUD
Retailer 6$5,458 AUD
Retailer 14$5,628 AUD
Retailer 15$5,643 AUD
Retailer 5$5,741 AUD
Retailer 1$6,011 AUD
Retailer 2$6,260 AUD
Retailer 7$7,202 AUD
Retailer 8$7,964 AUD
Retailer 4$8,328 AUD
Retailer 13$9,707 AUD
Retailer 9$10,369 AUD

28 data points across 15 retailers

17 retailers$4,771 AUD to $10,369 AUD

A
Cheapest Retailer
-
$4,771 AUD
A
Retailer 2
-
$5,050 AUD
View
A
Retailer 3
-
$5,261 AUD
View
A
Retailer 4
-
$5,410 AUD
View
A
Retailer 5
-
$5,458 AUD
View
Final sale: no returns
A
Retailer 6
-
$5,628 AUD
View
A
Retailer 7
-
$5,643 AUD
View
A
Retailer 8
-
$5,741 AUD
View
A
Retailer 9
-
$6,011 AUD
View
A
Retailer 10
-
$6,255 AUD
View
A
Retailer 11
-
$6,260 AUD
View
Retailer 12
-
$6,674 AUD
View
Price last confirmed 28 days ago
B+
Retailer 13
-
$7,964 AUD
View
B+
Retailer 14
-
$8,328 AUD
View
B+
Retailer 15
-
$9,707 AUD
View
B+
Retailer 16
-
$10,369 AUD
View
Most Expensive
NZ Jewellers
9a869dfd-3c5c-419e-899d-e93f71b54a19 · Sep 25
$11,644 AUD
$8,151 USD
View
Price last confirmed 41 days ago
16 more retailers have this diamond
Prices start from $4,771 AUDSave up to $5,598 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
$4,771 AUD