Diamonds have high light transmittance and do not emit light. Its glittering and translucent is the visual effect produced by reflection and refraction of external light. If you want to make transparent objects, such as diamonds, glass products, transparent or translucent plastics, window screens, lace and so on. Beautiful, in addition to the front lighting can not be too strong, you must add backlight, so that light can penetrate the object from the back, with the side lighting to produce light reflection, in order to produce the desired effect.
Give you some examples of backlighting: