Countertop basin on composite marble top

[Paul McAuley]

I have ceramic basin (half sphere bowl!) to fit onto composite marble top ( 15mm thick), I am wondering if the weight of basin ( about 6/7kg!) will create point load, and potential lead to cracking. Should the worktop have supporting struts to better support basin and help prevent failure??

 

[fowlerboi]

How big is the area its spanning? Those composite marble tops are pretty strong stuff I personally wouldn't be worrying too much