Their bright shine and attention-grabbing sparkle make them a clear focal point on for any wearer, against any clothing or style, and in any shade of gold. Nevertheless, making the choice between white and yellow gold isn't as easy as shrugging peaceably and telling your jeweler, "They both look good - you pick." Instead, check for "sparkles." A real diamond will sparkle significantly more than an equivalently-size piece of glass or quartz. You may want to take along a piece of glass or quartz as reference. Don't confuse sparkle with reflection. Sparkle has to do with the brilliance or intensity of the light that's refracted by the cut of the gem. The answer is yes, diamonds can still sparkle in the dark. In fact, they can actually shine even brighter in the dark than they do in the light. The reason for this is because diamonds are made of carbon. And when carbon is exposed to darkness, it actually emits a small amount of light. So, if you want your diamond to shine its brightest, make 1VKi87.