I'm wondering the same thing with my backsplash. One decorating magazine says the mosaic tiles are the way to go (glass seems very popular). Then another says that mosaic is hard to clean and should be avoided. I currently have a white glass strip mosaic sample and a white subway tile sample sitting next to my countertop. It will be interesting to hear from people who have had their mosaics for awhile...I do question about cleaning them, particularly behind the stove.

I'm interested in this as well, so I'll bump it to the top.

My opinions regarding this topic are reflective of both my tile setting experience as well as being a savvy homeowner that prefers not to be owned by the materials I select. Earlier on in my career I have installed quite a few tumbled stone backsplashes and showers for family, friends and customers, ranging from 12x12 to smaller ½”x ½” mosaics. Regardless of the size of the tiles most applications wear similarly, yes, grout being the most susceptible to staining you can argue that; more grout more problems, right? Truth is from the mid 90’s on most of our work included some sort of mosaic tumbled or textured natural stone mixed with different colored glass tiles. With regards to staining or difficulties in maintaining I have not experience any issues that I can recall. Once properly sealed, tumbled stone will provide years of durable service-providing you follow some simple care and maintenance steps. For starters I suggest using a brand name water based sealer and wiping up spills and splatter from behind the stove within a reasonable amount of time. (Define a reasonable amount of time…. Sometime after you’re done eating and before you go to bed!) I prefer water based sealers over solvents for a few reasons, most importantly the toxic fumes and VOCs and the other is I find the larger molecule formulation fill the larger pores in the grout better compared to the thinner solvent based structure. As mentioned prior, all natural stones and grouts will patina over time (unless you decide to use epoxy grouts). Sealing natural stone backsplashes in any pattern will not stop the natural patina; it will only help keep foods and beverage stains out between cleaning or before it permeates the surface. Keeping stains out is not that difficult but keeping it the same color as it was when it was installed will be close to impossible. Slight discoloration is considered normal and should not be looked at as a failure of the cleaning techniques or a breakdown of the sealer. So if the look of mosaics is what you are looking for than go for it. If you are concerned with care and use and like the looks of the cream and beige tones I would recommend selecting a tumbled marble vs. tumble Limestone; the look is similar but the performance could be drastically different. However, differentiating between the two can sometimes be difficult, make sure you ask the sales person and if he/she is not sure ask them to investigate. As a rule of thumb, tumbled limestone is naturally more porous than tumbled marble. Given the natural state of porosity, it is recommended to have the installer seal the tiles prior to grouting. Pre-sealing will only help the grout installer wipe the tiles clean resulting in easier cleaner installation. It is important to seal the entire application including grout a few days after installation, while the grout may look dry after a few hours it takes a few days for the grout to cure, grouting prior to this point will not yield the same protection. I hope this helps.

Thanks for your helpful response. It is reassuring about the direction I'm thinking. While I don't want ANY grout to deal with on the counter top, grout on the backsplash seems very different for day to day livability. With previous 4 x4 (?) backsplash tiles, I had no problems at all.

Anyone with the bullet mosaics (I think that's what they're called) have any regrets with maintaining?