Sterling Silver Three stone Ruby Heart Pendant (1/8 cttw) Crafted In Solid Sterling Silver All purchases from SuperJeweler come with The SuperJeweler Lifetime Guarantee. Your SuperJeweler jewelry purchase includes a lifetime guarantee against the loss of side stones or damage to the jewelry's setting or center stone. It also includes a one-year replacement guarantee against the loss of your jewelry's center stone. Ruby, a member of the corundum family of gemstones, is generally red in color, from light pink to dark red. The most common treatment for the enhancement of color is heat treating. In the heat treating process, rough un-cut rubies are heated to 1700-1800 degrees Celsius, which improves both color and clarity. All rubies that Superjeweler sells are heat treated for the enhancement of red color and clarity.