Beryl. — Heb., Tarshish, a variety of the topaz.
His feet. — More correctly, the place where his feet were, or the lower extremities of his limbs. We are not told in what position the man was when Daniel first saw him. Later on (Daniel 12:6) he is described as being upon or above the waters. In this position he symbolises God as supreme over the nations who are represented by the Tigris.