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Cushion|Natural|GIA

1.30ct I SI1 Cushion Natural Diamond

EX • I/SI1 • GIA 6421716473

Certificate GIA 6421716473

Diamond specifications and retailer prices

From $3,269 AUD
As of November 6, 2026
Save $1,333 AUD (29%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $6,458 AUD at MOH London · As of October 29, 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 6421716473. Listed at 13 retailers as of November 6, 2026, with a 41% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6421716473
Dimensions6.01 × 5.94 × 4.12 mm
L/W Ratio1.01
Top View
6.01 mm5.94 mm1.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6421716473
Side View
Table 58.0%CrownGirdle: THK-ETKPavilionCulet: NoneDepth 69.3%

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: $6,458 AUD|Low: $3,269 AUD|High: $6,503 AUD|Avg: $4,360 AUD|+0.5%
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 8$3,269 AUD
Retailer 10$3,285 AUD
Retailer 5$3,633 AUD
Retailer 9$3,633 AUD
Retailer 7$3,660 AUD
Retailer 11$3,662 AUD
Retailer 2$3,916 AUD
Retailer 6$4,323 AUD
Retailer 4$4,602 AUD
Retailer 3$5,327 AUD
MOH London$6,458 AUD

39 data points across 11 retailers

13 retailers$3,269 AUD to $4,602 AUD

A
Cheapest Retailer
-
$3,269 AUD
A
Retailer 2
-
$3,285 AUD
View
A
Retailer 3
-
$3,633 AUD
View
A
Retailer 4
-
$3,633 AUD
View
A
Retailer 5
-
$3,660 AUD
View
A
Retailer 6
-
$3,662 AUD
View
A
Retailer 7
-
$3,871 AUD
View
A
Retailer 8
-
$3,871 AUD
View
Retailer 9
-
$3,916 AUD
View
A
Retailer 10
-
$3,988 AUD
View
B+
Retailer 11
-
$4,323 AUD
View
B+
Retailer 12
-
$4,602 AUD
View
Most Expensive
MOH London
38CB6E673 · Oct 29
$6,458 AUD
£3,494 GBP
View
Price last confirmed 9 days ago
12 more retailers have this diamond
Prices start from $3,269 AUDSave up to $1,333 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
$3,269 AUD