The metal jewellery pieces are mostly either silver plated, sterling silver, steel & alluminium. To prevent tarnishing or yellowing keep stored in a box or sealed bag to avoid moisture exposure. Remove before showering, exercising or sleeping to prolong the finish of the metal. To clean use a polishing cloth.
To look after polymer clay earrings store carefully and avoid bending. Polymer clay is flexible but can still snap with enough force.
Some of the handmade decor and earrings are made with resin. Though resin is durable, like a lot of materials/plastics it can discolour over time when left in direct sunlight. Keeping your resin pieces out of direct sunlight will preserve them and their clarity and colour. Resin should also stay away from flames & other direct heats.