Why men are not allowed to wear gold jewels ? any particular reason?
Gold is not inherently evil. There are a several ahadith that mention, in some cases, prohibitions and, in other cases, allowances. If one investigates these ahadith a clear picture appears that shows the negative attitude towards gold is really related to pomposity and haughtiness, which are clearly qualities that Islam wants to cleanse us from. Things like gold and silk were considered to be symbols of highness and pride and were therefore discouraged by the Prophet (pbuh).
I hope I have clarified the issue.
God knows best.