![]() Jewelry store spotlights can be used to over-brighten stones, disguising leakage. Under normal lighting, areas of leakage cause it to appear smaller and darker than Stone A. In general terms, brightness is desirable, leakage is to be avoided – with exceptions. Intermediate Diamond Performance Brightness and Leakageĭepending on the main facet angles, light entering a diamond will either reflect and shoot up to the viewer’s eyes (as brightness) or escape through the bottom (as leakage or windowing). Request an Ideal Scope image of diamonds you’re considering, to decisively assess brightness, leakage and contrast. PriceScope Pointer: Use our free Holloway Cut Advisor (HCA) tool to reject poor round diamond performance. Dirt: (temporary) Dullness caused by grease, dirt or detritus on the diamond’s surface.Haze: Clouds, graining or other characteristics dense enough to interfere with transparency.Over-Obstruction: The presence of any observer creates darkness (shallow diamonds).Leakage: Dark or dead areas where light escapes through the bottom of the stone (photos below).Scintillation: The on-off pattern of brightness, contrast, and colored flashes seen when the diamond, observer or light source are in motion (video coming).Fire: Dispersed light your eyes see as spectral colored flashes (photos below).Contrast: Areas which are temporarily dark due to your head’s shadow (photos below).Brightness: All reflections of white light (photos below).Ask our PriceScope members and industry experts for a second opinion or get lost in the thousands of user-shared diamond and jewelry images for inspiration.
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