Herbies Pucks floor spike protectors...

You can't easily get Herbie's products here in the UK so I make do with sorbothane or similar.

However, everything I've read about them seems to make straightforward sense. On a solid floor like yours they may be less effective than say on a suspended floor, but it will still depend largely upon the way your speakers have been constructed. 

I'd say it's well worth a try.   

I use them with my Vandy Treo’s. I use them to protect my wood floors.
I can’t say that they either help or hinder, as I would not put spike marks in my floor.
They also help with moving and adjusting the speaker as they glide easily.
FWIW,
I’d be worried if those spikes could put a chip or make a crack in travertine.
Bob

I'd be more concerned with keeping your S/O happy and floor damage.

Years ago, I purchased two dozen of these for less than the cost needed for a pair of speakers.
https://www.ebay.com/itm/20pcs-Gold-Discs-Audio-Cones-Amp-Speaker-Spikes-Stands-Base-25mm/2724831770...

You might even find something that resembles the Herbies, if you have the patience to wade through the listings.

Speaker/subs,table and CD deck are spiked, so I wasn't about to pay for the audiophool versions.

The description of what the  titanium version is supposed to do, seems a little....
nevermind
https://herbiesaudiolab.com/collections/loudspeaker-rack-decoupling-and-isolation/products/cone-spik...

Use Herbie's cone/spike decoupling gliders. They work very well in isolating the speakers so they don't vibrate the floors. I also use them under my rack to isolate from floor borne vibrations. They will also protect your tile.

https://herbiesaudiolab.com/collections/loudspeaker-rack-decoupling-and-isolation/products/cone-spike-decoupling-glider?variant=12645103403063

i have 2 brand new , will save you some money.