The perfect combination for those with sensitivities. The post earrings (and backing) are 100 % pure titanium. The lava stone is perfect for those that love essential oils. Put a drop on the lava stone, give it a minute to soak in, then wear them. The beads are 6mm. They dangle down about 1/2 inch. Want another color of wire/beads? Check out the last photo. More coming! Titanium is a pure metal, not an alloy. This means there is no nickel, lead or copper (or other metals) mixed with it. It is considered allergy free or non-allergenic. It is non-reactive, meaning it won't rust or tarnish over time. It is also very strong. I have had several people test this wire for me, many of them could not wear any earrings without having problems with their ears. These earrings did not cause any reaction at all. To find more titanium earrings, click here... https://www.etsy.com/shop/mompotter/search?search_query=titanium&order=date_desc&view_type=gallery&ref=shop_search