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Round|Natural|GIA

1.30ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2557211440

Certificate GIA 2557211440

Diamond specifications and retailer prices

From $2,614 AUD
As of November 6, 2026
Save $3,467 AUD (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,081 AUD at MOH London · As of November 4, 2026
View at MOH London

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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557211440. Listed at 13 retailers as of November 4, 2026, with prices from $2,614 to $6,081, a $3,467 spread on the same certified stone. MOH London lists it at $6,081. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2557211440
Dimensions6.94 × 6.90 × 4.34 mm
L/W Ratio1.01
Top View
6.94 mm6.90 mm1.30 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557211440
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

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 6
Current: $6,081 AUD|Low: $2,596 AUD|High: $7,482 AUD|Avg: $4,001 AUD|-2.8%
MOH London
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
November 6, 2026
Retailer 12$2,614 AUD
Retailer 6$2,753 AUD
Retailer 8$3,176 AUD
Retailer 13$3,193 AUD
Retailer 16$3,193 AUD
Retailer 3$3,213 AUD
Retailer 2$3,330 AUD
Retailer 9$3,638 AUD
Retailer 4$3,648 AUD
Retailer 11$3,660 AUD
Retailer 15$3,880 AUD
Retailer 10$4,248 AUD
Retailer 5$4,345 AUD
Retailer 14$5,333 AUD
MOH London$6,081 AUD
Retailer 7$6,714 AUD

30 data points across 16 retailers

13 retailers$2,614 AUD to $6,081 AUD

A
Cheapest Retailer
-
$2,614 AUD
Retailer 2
-
$2,753 AUD
View
Price last confirmed 29 days ago
A
Retailer 3
-
$3,193 AUD
View
A
Retailer 4
-
$3,193 AUD
View
A
Retailer 5
-
$3,213 AUD
View
Final sale: no returns
A
Retailer 6
-
$3,330 AUD
View
A
Retailer 7
-
$3,638 AUD
View
B+
Retailer 8
-
$3,648 AUD
View
A
Retailer 9
-
$3,660 AUD
View
B+
Retailer 10
-
$3,880 AUD
View
B+
Retailer 11
-
$4,248 AUD
View
B+
Retailer 12
-
$5,333 AUD
View
Most Expensive
B
MOH London
488879128 · Nov 4
$6,081 AUD
£3,352 GBP
View
12 more retailers have this diamond
Prices start from $2,614 AUDSave up to $3,467 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
$2,614 AUD