Emerald is a gemstone and a variety of the mineral beryl colored green by trace amounts of chromium and sometimes vanadium.
emerald bụ nnukwu nkume na ọtụtụ mineral beryl na-acha akwụkwọ ndụ akwụkwọ ndụ site na nchọta nke chromium na mgbe ụfọdụ vanadium.