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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 1558878113

Certificate GIA 1558878113

Diamond specifications and retailer prices

From $3,966 AUD
As of November 4, 2026
Save $4,627 AUD (54%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $8,593 AUD at MOH London · As of November 7, 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 1558878113. Listed at 6 retailers as of November 4, 2026, with prices from $3,966 to $8,593, a $4,627 spread on the same certified stone. MOH London lists it at $8,593. 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
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1558878113
Dimensions7.58 × 5.58 × 3.89 mm
L/W Ratio1.36
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
7.58 mm5.58 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryGood
FluorescenceFaint
CertificateGIA 1558878113
Side View
Table 60.0%CrownGirdle: STK-ETKPavilionCulet: 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 4
Current: $8,593 AUD|Low: $3,176 AUD|High: $8,685 AUD|Avg: $5,356 AUD|+2.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 5$3,966 AUD
Retailer 6$4,167 AUD
Retailer 3$5,151 AUD
Retailer 2$5,346 AUD
Retailer 4$6,015 AUD
MOH London$8,593 AUD

45 data points across 6 retailers

6 retailers$3,966 AUD to $8,593 AUD

A
Cheapest Retailer
-
$3,966 AUD
Retailer 2
-
$4,167 AUD
View
Price last confirmed 23 days ago
B+
Retailer 3
-
$5,151 AUD
View
B
Retailer 4
-
$5,346 AUD
View
B
Retailer 5
-
$6,015 AUD
View
Most Expensive
B
MOH London
E77C6CB3A · Nov 7
$8,593 AUD
£4,649 GBP
View
5 more retailers have this diamond
Prices start from $3,966 AUDSave up to $4,627 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
$3,966 AUD