Stone inlays and mosaics are nice works of art. It takes a lot of time and skill to place the stone properly in order to maintain a level surface. Cutting the shapes just right is also difficult. Skill is also required in selecting the individual pieces of stone so that they look good with each other. The overall product is rich and elaborate and can be expensive, but it shows a certain dedication that is apparent in the various arts used in LDS temples. Here are some examples that I found.
Temple baptisteries had a lot of examples of stone inlays. The following picture shows stonework in the floors of the following temples (left to right, top to bottom): Draper Utah, Santo Domingo Domican Republic, San Diego California, Toronto Ontario, Panama City Panama, Vernal Utah, Las Vegas Nevada, and Portland Oregon. Particularly interesting is the San Diego California Temple with its eight sided star which is similar to the eight sided Seal of Melchizedek symbol used throughout that temple. Also, the Las Vegas Nevada Temple and Portland Oregon Temple each have a Star of David on the floor. Another interesting pattern is the Panama City Panama Temple's baptistry inlay which is a symbol used by Native Americans in Panama.
Please write and let us know what you think about these stone inlays/mosaics in Mormon Temples and any interesting ones that I skipped that you want to highlight.