Ruby This rare, very durable and valuable fiery red gem of passion and courage can vary significantly in hue. Its stunning depth of color is its most important and distinguishing feature, with the most preferred being deep, vivid “blood” red. Of secondary importance to its value is its transparency. It is the birthstone for the month of July.
Amethyst Amethyst is the most famous variety of quartz. It is also durable, abundant and affordable. It comes in all shades of purple, a color often associated with royalty. The value of an amethyst depends more on its color than its size. The deeper the shade of purple, the higher its value. It is the birthstone for the month of February.