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Cushion|Natural|GIA

1.30ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 5231921674

Certificate GIA 5231921674

Diamond specifications and retailer prices

From $2,617 AUD
As of November 6, 2026
Save $1,854 AUD (41%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $4,471 AUD at MOH London · As of November 4, 2026
View at MOH London

About this 1.3ct natural cushion diamond

This 1.3ct natural cushion 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 5231921674. Listed at 5 retailers as of November 4, 2026, with prices from $2,617 to $4,471, a $1,854 spread on the same certified stone. MOH London lists it at $4,471. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5231921674
Dimensions6.93 × 5.57 × 3.79 mm
L/W Ratio1.24
Top View
6.93 mm5.57 mm1.30 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5231921674
Side View
Table 61.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 68.0%

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: $4,471 AUD|Low: $2,559 AUD|High: $4,536 AUD|Avg: $3,266 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 5$2,559 AUD
Retailer 2$2,617 AUD
Retailer 4$2,839 AUD
Retailer 3$3,474 AUD
MOH London$4,471 AUD

41 data points across 5 retailers

5 retailers$2,617 AUD to $4,471 AUD

Retailer 1
-
$2,559 AUD
Price last confirmed 12 days ago
A
Retailer 2
-
$2,617 AUD
View
A
Retailer 3
-
$2,839 AUD
View
B+
Retailer 4
-
$3,474 AUD
View
Most Expensive
B
MOH London
57D7BD527 · Nov 4
$4,471 AUD
£2,419 GBP
View
4 more retailers have this diamond
Prices start from $2,617 AUDSave up to $1,854 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 Cushion
$2,617 AUD