Emerald is the most famous member of the beryl family. Legends endowed the wearer with the ability to foresee the future when emerald was placed under the tongue, as well as to reveal truth and be ...

Figure 4 shows an emerald crystal (about 7 × 7 × 8 mm ... There are four parts: one or two colorless beryl cores, a light green hexagonal growth zone area, a green rim, and six (or two sets of six) ...