Advice re sealing zamorra mosaic brick please

[CJC]

Hello, looking for advice re sealing zamorra mosaic brick sheets (stone with some glass / metal 'bricks'). I was sold Fila protector for honed/tumbled travertine/marble, which seems ok - I've tried it out on a spare section, but wondered if this was the best stuff to use for these tiles. I'm just about to do a small wall with them so want it to look its best when finished. Thanks in advance.

 

[CJC]

Checked with the store where I got them and they tell me they're pre-sealed ......but I reckon it can't hurt to seal again .... but I'm drawing a blank trying to find out exactly what kind of stone they are ......so, I'm going to go with the FILA stuff I've got - testing it out on a spare section looked fine. As a more general question, can anybody suggest a good source of info re stone tiles in terms of types / how they should be treated etc ?

 

[CJC]

Here's a couple of pics of how they turned out.