You may believe if you choose that xrusos comes from Hebrew Harûz but I
prefer to believe that it is a unique derivation from PIE
*ghre:u-(**s- ).
Why would the Greeks need to borrow a word for
'gold'?
Do you have access to the argumentation supporting it as a
loan?
============
According to a friend of mine, who is an
archeologist,
no metal can be very ancient,
including gold.
So it's not impossible that most of these words are
loanwords
including my *H_H_w-s.
especially in view of Arabic dhahb <
*dahb.
H2 out of *d is not possible.
It requires an already evolved form
*dahb
then
*dhahb
then
*zahb
loanword
HaHw-
Arnaud