Ruby is a red mineral, ranging in color from pink to fiery red to deeper reds. Highest-quality rubies are transparent, with few inclusions and are rare. The gemstone is also July's birthstone and (because of its red color) often represents love. For these reasons, synthetic / simulated rubies are common in rings; they are less pricey and more plentiful than equivalent natural pieces. and below for a range of mens ruby rings.