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Cushion|Natural|GIA

1.30ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 3545458575

Certificate GIA 3545458575

Diamond specifications and retailer prices

From £1,788 GBP
As of November 6, 2026
Save £1,617 GBP (47%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £3,405 GBP at With Clarity · As of November 6, 2026
View at With Clarity

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 H 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 3545458575. Listed at 6 retailers as of November 6, 2026, with prices from £1,788 to £3,405, a £1,617 spread on the same certified stone. With Clarity lists it at £3,405. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3545458575
Dimensions6.41 × 6.11 × 4.19 mm
L/W Ratio1.05
Top View
6.41 mm6.11 mm1.30 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3545458575
Side View
Table 62.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 68.6%

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: £2,158 GBP|Low: £1,788 GBP|High: £3,405 GBP|Avg: £2,571 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
With Clarity
November 5, 2026
Retailer 4£1,788 GBP
Retailer 5£2,152 GBP
Retailer 1£2,158 GBP
Retailer 3£2,533 GBP
Retailer 2£2,572 GBP
Retailer 6£2,797 GBP
Retailer 7£3,026 GBP
With Clarity£3,405 GBP

11 data points across 8 retailers

6 retailers£1,788 GBP to £3,405 GBP

A
Cheapest Retailer
-
£1,788 GBP
A
Retailer 2
-
£2,152 GBP
View
A
Retailer 3
-
£2,158 GBP
View
B+
Retailer 4
-
£2,533 GBP
View
B+
Retailer 5
-
£2,572 GBP
View
Most Expensive
B
With Clarity
3545458575 · Nov 6
£3,405 GBP
$4,557 USD
View
5 more retailers have this diamond
Prices start from £1,788 GBPSave up to £1,617 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
£1,788 GBP