Boyd’s Bible Dictionary:
(del’i-um, a plant and its gum). A fragrant gum resin. But in Genesis 2:12 and Numbers 11:7, a precious stone.
Concise Bible Dictionary:
The word bedolach has been interpreted to signify both a white transparent oily gum, and a white pearl. Its color is referred to in the description of the manna (Num. 11:7), and in Genesis 2:12 it is mentioned with gold and onyx stones as characterizing the land of Havilah. The white pearl seems the more probable allusion, for the manna is in Exodus 16:14 compared also to the hoar frost.
Pearl Ring
Strong’s Dictionary of Hebrew Words:
Meaning:
probably from 914; something in pieces, i.e. bdellium, a (fragrant) gum (perhaps amber); others a pearl
Jackson’s Dictionary of Scripture Proper Names:
in turbidity