[Rockhounds] Morganites and beryls.

[EDWARD J WAGNER]

Hello, list members. While recently looking at beryls identified as morganites, I found one that raised an ID question. Altho the habit is the flat, thin angles sides of morganite, the color went from being a white-ish color more akin to goshenite, with the exception of one quarter, which had an orange-ish color.  I am puzzled. Could this be a bi-colored morganite? Perhaps it's a bicolored goshenite? What are, if any, the standard for ID-ing this type of specimen? Many bi-colored beryls exist in Western NC, especially green and yellow stones from Crabtree emerald mine. Any comments? Thanks. EJWagner.