It not wrong, some find it disrespectful to their faith. If a Rosary isnt of your belief it doesnt mean anything to you, then its just a necklace. I would just be respectful to others and not flaunt it around. My first question would be why you want to wear one if your not Catholic? You can find a lot of pretty cross necklaces all over the place.
Here's the reason why someone told you it wasn't good: Christians believe totally that Christ rose from the dead - therefore He shouldn't be portrayed as still suffering on the cross, because He gained VICTORY over the cross and rose again... I wouldn't wear one, just as a matter of personal opinion, but there is absolutely nothing BAD about wearing it...
Suppose a loved one of yours was brutally murdered and the weapon, let's say a gun or knife, was submitted as evidence. Would you try to gain possession of the murder weapon, take photographs of it, and print copies for distribution? Would you produce replicas of the weapon or fashion some of them into jewelry to be sold to friends and family? Likely you would be disgusted at the idea! Yet, these very things have been done with the cross, which appears on rosary beads.
Rosary beads themselves are used in the practice of repetitious prayers by those of the Catholic faith. Beyond the cross being part of the rosary beads design, it is important to remember that Jesus condemned the practice of repeating prayers that the rosary is used for. Jesus said: “But when praying, do not say the same things over and over again, just as the people of the nations do, for they imagine they will get a hearing for their use of many words. So, do not make yourselves like them…” (Matthew 6:7,8) In view of his warning, the fact that the rosary is viewed as an innocent fashion statement or trend should not overrule a Christian’s respect of Christ and live in a way that he approves. Hope this helps!
No not really. But the purpose of wearing a Rosemary is for praying or showing that respect God. It would be different if you were wearing a cross necklace as jewelry rather than a rosemary. The cross necklace is more popular and sometimes not as visible as the rosemary.