Bdellium

occurs only in Gen. 2:12, where it designates a product of the
land of Havilah; and in Num. 11:7, where the manna is likened to
it in colour. It was probably an aromatic gum like balsam which
exuded from a particular tree (Borassus flabelliformis) still
found in Arabia, Media, and India. It bears a resemblance in
colour to myrrh. Others think the word denotes "pearls," or some
precious stone.