This achievement requires you to make an emerald and a star in the same game.
Emeralds are made by lining up 5 of the same color tiles and Starflowers are made by making a star out of 6 tiles of the same color. This is easily done in Marathon Mode on Beginner. Sometimes, there will be at least one Starflower that you can make from the start. All you have to do from then is to make an Emerald, if you are having troubles, try creating a combo or two at the bottom of the board, this will usually result in a chain reaction ranging anywhere from 1-20 sequential combinations and most of the time an Emerald will be made in the process.