Emeralds typically contain inclusions that are visible to the unaided eye. Because of this, trade members and some consumers understand and accept the presence of inclusions in emeralds. Eye-clean emeralds are especially valuable because they’re so rare. Emerald inclusions are often described as looking mossy or garden-like. They’re sometimes called “jardin,” which is French for garden.
Retrieved from : http://www.gia.edu/emerald-quality-facto 14/052015