Materials Used

List of Materials Used 

Chains

Gem Chains: Made from Copper will eventually tarnish

Regular Chains: 3.5mm made from High Quality Brass + 14K Gold Color Plated

Clasp Options

Lobster Claws : Stainless Steel

Secure Lock Magnets : "Metal Alloy" / Copper / Zinc Alloy (you get differing options based on where you order so I'm not going to discount any one option from here that they might include)

Quick Detach Magnets : Zinc Alloy

Attachments:

O Rings : Food Grade Silicon 

Regular Glasses Attachments: Silicon