How to cut 'pseudo-marble?'

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I have an 80's-era sink in my 1/2 bath and I need to shave about 1/4 inch off the side of the backsplash. It isn't really marble, but similar and way cheaper. There is actually a curling iron or cigarette brown spot on the sink. Can this cut be made with a jigsaw and if so, what type of blade?

Thanks in advance,

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[Mrmyke709]

Cutting cultured marble

 

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Thank you!

 

[ctrl+alt+del]

Actually, I was able to cut it with a jigsaw blade, in particular DeWalt DW3720H. Worked like a charm, but then again, I only had to cut like 4 inches.