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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

ID • I/SI1 • GIA 6435484641

Certificate GIA 6435484641

Diamond specifications and retailer prices

From $2,888 AUD
As of November 6, 2026
Save $3,582 AUD (55%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $6,469 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6435484641. Listed at 23 retailers as of November 4, 2026, with prices from $2,888 to $6,469, a $3,582 spread on the same certified stone. MOH London lists it at $6,469. 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
I
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.5°
Pavilion angle57.65°
OriginNatural
Grading LabGIA
CertificateGIA 6435484641
Dimensions6.24 × 5.92 × 4.14 mm
L/W Ratio1.05
Top View
6.24 mm5.92 mm1.30 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6435484641
Side View
Table 64.0%Crown 38.5°Girdle: STK-VTKPavilion 57.65°Culet: NoneDepth 69.9%

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: $6,469 AUD|Low: $2,888 AUD|High: $6,556 AUD|Avg: $4,006 AUD|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 10$2,888 AUD
Retailer 4$2,889 AUD
Retailer 9$3,305 AUD
Retailer 5$3,590 AUD
Retailer 3$3,668 AUD
Retailer 11$3,720 AUD
Retailer 2$3,916 AUD
Retailer 7$4,021 AUD
Retailer 8$4,518 AUD
Retailer 6$4,596 AUD
MOH London$6,469 AUD

27 data points across 11 retailers

23 retailers$2,888 AUD to $6,469 AUD

A
Cheapest Retailer
-
$2,888 AUD
A
Retailer 2
-
$2,889 AUD
View
A
Retailer 3
-
$3,278 AUD
View
A
Retailer 4
-
$3,305 AUD
View
A
Retailer 5
-
$3,323 AUD
View
A
Retailer 6
-
$3,345 AUD
View
A
Retailer 7
-
$3,416 AUD
View
Final sale: no returns
A
Retailer 8
-
$3,590 AUD
View
A
Retailer 9
-
$3,668 AUD
View
Retailer 10
-
$3,703 AUD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$3,720 AUD
View
A
Retailer 12
-
$3,906 AUD
View
A
Retailer 13
-
$3,916 AUD
View
A
Retailer 14
-
$4,008 AUD
View
A
Retailer 15
-
$4,021 AUD
View
A
Retailer 16
-
$4,031 AUD
View
A
Retailer 17
-
$4,091 AUD
View
Retailer 18
-
$4,148 AUD
View
Price last confirmed 31 days ago
B+
Retailer 19
-
$4,518 AUD
View
B+
Retailer 20
-
$4,596 AUD
View
B
Retailer 21
-
$5,442 AUD
View
B
Retailer 22
-
$5,593 AUD
View
Most Expensive
B
MOH London
C75FA4012 · Nov 4
$6,469 AUD
£3,500 GBP
View
22 more retailers have this diamond
Prices start from $2,888 AUDSave up to $3,582 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
$2,888 AUD