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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 5526567353

Certificate GIA 5526567353

Diamond specifications and retailer prices

From $3,646 AUD
As of November 6, 2026
Save $2,342 AUD (39%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,988 AUD at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

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 5526567353. Listed at 6 retailers as of November 6, 2026, with prices from $3,646 to $5,988, a $2,342 spread on the same certified stone. 77 Diamonds lists it at $5,988. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5526567353
Dimensions6.50 × 5.89 × 4.11 mm
L/W Ratio1.10
Top View
6.50 mm5.89 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5526567353
Side View
Table 66.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 69.8%

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 6
Current: $5,988 AUD|Low: $3,646 AUD|High: $6,106 AUD|Avg: $4,581 AUD|+0.4%
77 Diamonds
Retailer 2
Retailer 3
November 6, 2026
Retailer 3$3,646 AUD
Retailer 2$4,034 AUD
77 Diamonds$5,988 AUD

39 data points across 3 retailers

6 retailers$3,646 AUD to $5,988 AUD

A
Cheapest Retailer
-
$3,646 AUD
A
Retailer 2
-
$3,962 AUD
View
A
Retailer 3
-
$3,985 AUD
View
A
Retailer 4
-
$4,034 AUD
View
A
Retailer 5
-
$4,157 AUD
View
Most Expensive
B+
77 Diamonds
CUSZCPYKTYVG · Nov 6
$5,988 AUD
£3,240 GBP
View
5 more retailers have this diamond
Prices start from $3,646 AUDSave up to $2,342 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
$3,646 AUD