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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 $3,579 NZD
As of November 6, 2026
Save $4,439 NZD (55%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $8,018 NZD 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 $3,579 to $8,018, a $4,439 spread on the same certified stone. MOH London lists it at $8,018. 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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $8,018 NZD|Low: $3,579 NZD|High: $8,126 NZD|Avg: $4,965 NZD|-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$3,579 NZD
Retailer 4$3,581 NZD
Retailer 9$4,097 NZD
Retailer 5$4,450 NZD
Retailer 3$4,546 NZD
Retailer 11$4,611 NZD
Retailer 2$4,854 NZD
Retailer 7$4,984 NZD
Retailer 8$5,599 NZD
Retailer 6$5,697 NZD
MOH London$8,018 NZD

27 data points across 11 retailers

23 retailers$3,579 NZD to $8,018 NZD

A
Cheapest Retailer
-
$3,579 NZD
A
Retailer 2
-
$3,581 NZD
View
A
Retailer 3
-
$4,062 NZD
View
A
Retailer 4
-
$4,097 NZD
View
A
Retailer 5
-
$4,118 NZD
View
A
Retailer 6
-
$4,145 NZD
View
A
Retailer 7
-
$4,234 NZD
View
Final sale: no returns
A
Retailer 8
-
$4,450 NZD
View
A
Retailer 9
-
$4,546 NZD
View
Retailer 10
-
$4,589 NZD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$4,611 NZD
View
A
Retailer 12
-
$4,842 NZD
View
A
Retailer 13
-
$4,854 NZD
View
A
Retailer 14
-
$4,968 NZD
View
A
Retailer 15
-
$4,984 NZD
View
A
Retailer 16
-
$4,997 NZD
View
A
Retailer 17
-
$5,071 NZD
View
Retailer 18
-
$5,141 NZD
View
Price last confirmed 31 days ago
B+
Retailer 19
-
$5,599 NZD
View
B+
Retailer 20
-
$5,697 NZD
View
B
Retailer 21
-
$6,745 NZD
View
B
Retailer 22
-
$6,932 NZD
View
Most Expensive
B
MOH London
C75FA4012 · Nov 4
$8,018 NZD
£3,500 GBP
View
22 more retailers have this diamond
Prices start from $3,579 NZDSave up to $4,439 NZD

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
$3,579 NZD