"White Star" is a cultivar of the more commonly known Calathea ornate or Pinstripe calathea. The central regions of the leaves are blushed - a muted but vibrant pink - that fades to white at the edges.
Calatheas prefer medium light to ensure their stripes stay bright pink; too much direct sun will make their markings fade. This plant likes to be kept evenly moist, never dry and never too wet. Put it on a tray of pebbles to keep the humidity high so that the leaf edges don’t turn brown or get to dry. Only replant when the roots and plant have grown quite large. This probably won’t be for a year or more after you bring the plant home. When you do decide it’s time to replant, do so in the spring.