That is luxury!

Boulder Turquoise Tile -  Handcrafted tile using turquoise cut to show veins of turquoise.

And a type of luxury I wouldn't refuse to apply in my own home interior design projects or a client's one :) - what do you think?
Using semi-precious stones as tiles is a beautiful way to invest your money and not necessarily showy. Enjoy some more examples:

Apple Coral Tile - Handcrafted tile displaying beautiful soft red, orange, and yellow color.

Custom Floor Mosaic using Gemstone Tile LLC luxurious Mosaic Turquoise tile and Boulder Turquoise tile.
And these are their Mosaic Turquoise tiles.