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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 £1,482 GBP
As of November 6, 2026
Save £1,839 GBP (55%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £3,321 GBP 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 £1,482 to £3,321, a £1,839 spread on the same certified stone. MOH London lists it at £3,321. 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: £3,321 GBP|Low: £1,482 GBP|High: £3,365 GBP|Avg: £2,063 GBP|-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 6, 2026
Retailer 10£1,482 GBP
Retailer 2£1,483 GBP
Retailer 8£1,697 GBP
Retailer 4£1,843 GBP
Retailer 3£1,883 GBP
Retailer 11£1,910 GBP
Retailer 9£2,010 GBP
Retailer 6£2,064 GBP
Retailer 7£2,319 GBP
Retailer 5£2,359 GBP
MOH London£3,321 GBP

26 data points across 11 retailers

23 retailers£1,482 GBP to £3,321 GBP

A
Cheapest Retailer
-
£1,482 GBP
A
Retailer 2
-
£1,483 GBP
View
A
Retailer 3
-
£1,682 GBP
View
A
Retailer 4
-
£1,697 GBP
View
A
Retailer 5
-
£1,706 GBP
View
A
Retailer 6
-
£1,717 GBP
View
A
Retailer 7
-
£1,753 GBP
View
Final sale: no returns
A
Retailer 8
-
£1,843 GBP
View
A
Retailer 9
-
£1,883 GBP
View
Retailer 10
-
£1,901 GBP
View
Price last confirmed 9 days ago
A
Retailer 11
-
£1,910 GBP
View
A
Retailer 12
-
£2,005 GBP
View
A
Retailer 13
-
£2,010 GBP
View
A
Retailer 14
-
£2,058 GBP
View
A
Retailer 15
-
£2,064 GBP
View
A
Retailer 16
-
£2,069 GBP
View
A
Retailer 17
-
£2,100 GBP
View
Retailer 18
-
£2,129 GBP
View
Price last confirmed 31 days ago
B+
Retailer 19
-
£2,319 GBP
View
B+
Retailer 20
-
£2,359 GBP
View
B
Retailer 21
-
£2,793 GBP
View
B
Retailer 22
-
£2,871 GBP
View
Most Expensive
B
MOH London
C75FA4012 · Nov 4
£3,321 GBP
View
22 more retailers have this diamond
Prices start from £1,482 GBPSave up to £1,839 GBP

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
£1,482 GBP