Inclusions of beryl crystals in Nacken synthetic emerald

Inclusions of beryl crystals in Nacken synthetic emerald

Figure 22. Larger inclusions of beryl crystals formed by spontaneous nucleation are occasionally found, as in this type 2 example. The included beryl crystal exhibits a core with a high concentration of trapped flux particles and a clear rim. The boundary between the almost clear rim and the host is best seen under crossed polarizers. Transmitted light (left), with crossed polarizers (right). Photomicrographs by H.A. Gilg.

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more: Chemical Composition , History , Synthesis Process

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