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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 $2,543 SGD
As of November 6, 2026
Save $3,154 SGD (55%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: $5,697 SGD 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 $2,543 to $5,697, a $3,154 spread on the same certified stone. MOH London lists it at $5,697. 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: $5,697 SGD|Low: $2,543 SGD|High: $5,773 SGD|Avg: $3,528 SGD|-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$2,543 SGD
Retailer 4$2,544 SGD
Retailer 9$2,911 SGD
Retailer 5$3,162 SGD
Retailer 3$3,230 SGD
Retailer 11$3,276 SGD
Retailer 2$3,449 SGD
Retailer 7$3,541 SGD
Retailer 8$3,978 SGD
Retailer 6$4,047 SGD
MOH London$5,697 SGD

27 data points across 11 retailers

23 retailers$2,543 SGD to $5,697 SGD

A
Cheapest Retailer
-
$2,543 SGD
A
Retailer 2
-
$2,544 SGD
View
A
Retailer 3
-
$2,886 SGD
View
A
Retailer 4
-
$2,911 SGD
View
A
Retailer 5
-
$2,926 SGD
View
A
Retailer 6
-
$2,945 SGD
View
A
Retailer 7
-
$3,008 SGD
View
Final sale: no returns
A
Retailer 8
-
$3,162 SGD
View
A
Retailer 9
-
$3,230 SGD
View
Retailer 10
-
$3,260 SGD
View
Price last confirmed 9 days ago
A
Retailer 11
-
$3,276 SGD
View
A
Retailer 12
-
$3,440 SGD
View
A
Retailer 13
-
$3,449 SGD
View
A
Retailer 14
-
$3,530 SGD
View
A
Retailer 15
-
$3,541 SGD
View
A
Retailer 16
-
$3,550 SGD
View
A
Retailer 17
-
$3,603 SGD
View
Retailer 18
-
$3,653 SGD
View
Price last confirmed 31 days ago
B+
Retailer 19
-
$3,978 SGD
View
B+
Retailer 20
-
$4,047 SGD
View
B
Retailer 21
-
$4,792 SGD
View
B
Retailer 22
-
$4,925 SGD
View
Most Expensive
B
MOH London
C75FA4012 · Nov 4
$5,697 SGD
£3,500 GBP
View
22 more retailers have this diamond
Prices start from $2,543 SGDSave up to $3,154 SGD

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
$2,543 SGD