Emerald identification

Whether it's raw jadeite or finished pieces, a close inspection of the polished surface typically reveals a distinct crystalline interwoven structure that resembles small specks. Within emerald jade, two types of crystals can be observed: one is granular, with slightly larger particles, and the other consists of fine, fibrous crystals that are intertwined. In most cases, the grain size of jadeite crystals remains relatively consistent. Stone flowers are another characteristic feature found in jadeite. These are small, uneven lumps composed of white, fibrous crystals that have low transparency and are interwoven throughout the stone. Unlike the speckles, which are more transparent, stone flowers appear slightly opaque or translucent. The coloration of emerald jade is not uniform. It often features varying shades of green, black, white, pink, and even green beans as a base. Additionally, lighter tones may appear within the green background, adding to its visual complexity. Emerald jade has a bright, polished luster that reflects light strongly, giving it a soft yet vibrant glass-like shine. This glossy appearance enhances its overall beauty and value. In terms of density and refractive index, jadeite is quite dense and sinks quickly in tribromomethane. In contrast, other similar stones like nephrite, serpentine jade, quartzite, and others tend to float or remain suspended. The refractive index of jadeite is approximately 1.66 (when measured with a spot test), whereas other jade varieties generally have a lower refractive index, usually below 1.63. Additionally, jadeite has a cool touch when held, and it does not change color under the Charles mirror test, further distinguishing it from other materials. These characteristics make jadeite a highly valued and unique gemstone.