Gemstone candle holders can be made from a variety of natural materials. Gemstone refers to a type of mineral which is used for decorative purposes. They are most often used in jewelry, but they can also be found in a variety of attractive home decor products, such as candle holders. The unique thing about gemstone candle holders is that they are natural, and thus each piece is different, with wild and erratic features that flow naturally from the earth, and which can converge with the beauty of the flame when a candle is lit within.