Crucifixes (being for Christians, a symbol of Christ's salvic death), should not be worn as jewelry (if by 'jewelry' you mean, 'personal adornment', ie something someone wears to be 'in style', 'cool' ect). For Christians, wearing a crucifix is an outward sign of faith in Christ, not a piece of adornment to wear because it reflects one's tastes in fashion/style.
Jewelry that is uncomfortable or jewelry that you make have an allergic reaction to should not be worn.
As society grows, anything can be bought anywhere. Crucifix jewelry can easily be bought on sites like eBay or such. Most of them would involve catholic beliefs or goods.
Crucifix rings are a symbolic representation of one's faith in Christianity. They feature a crucifix, symbolizing the sacrifice of Jesus Christ, and wearing them can serve as a personal reminder of one's beliefs and values. They are often worn as a statement of devotion and connection to the Christian faith.
One can purchase a gold crucifix on the online retailer eBay. There are a host of different sellers in the jewelry section of eBay that offer gold crucifixes for sale at reasonable prices.
Yes. Jewelry stores have mezuzot you can wear as pendants.
Whenever you wish
Parure
jewelry
The bracelet.
Ring
An ornament worn on the feet is a nupur. It is a piece of jewelry worn around the ankles (an ankle bracelet).
If a company is worth it's salt, no jewelry should be permitted on hands or arms while directly handling food. Jewelry is not sanitary and could harbor pathogenic bacteria.