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There are several glass mosaic tiles available in the market today (we cover that in our part 1 article). But in terms of manufacturing, there are mainly two kinds: vitreous glass mosaic tile and crystal glass mosaic tile.
One type is Vitreous Glass Mosaic Tile, which was the original glass mosaic tile and has been used widely to make swimming pool. To tell the quality if it is good or not, the hardness is the key thing you need to ask. Vitreous glass mosaic tile is not as strong as crystal glass mosaic although when it installed, inside the grout it will stay there for lifetime. You can tell the hardness by scratching the surface of the glass mosaic tile by your finger nail. If it can be easily scratched, then it may be a little problem. The second thing is that you if the color is consistent. Use your common sense and judgment on this.
