Penny-round tiles are fresh and versatile- they have a retro feel, but are completely modern! I have looked around other tile retailers- and the Tileshop has some of the best pricing on these cool mosaics:
Waterworks Penny tile in Robin's Egg:
$25 SF:
Daltile Keystone Shapes Penny Round tile in Waterfall:
$12.91 SF:
ModDotz Glazed Porcelain Penny Rounds Tile in Harbor:
$8.42 SF:
TILESHOP Glazed Porcelain Penny Rounds in Cobalt and Sky Blue:
$4.99 SF:
Here are some design ideas that feature Penny Round mosaic tiles: