I made a necklace that looks like a rainbow sky trapped in a soap bubble with resin. Rainbows are on both sides, so it looks like a double rainbow depending on the angle. The necklace is 45cm (chain length 40cm + 5cm adjuster). I use high-quality resin "Hoshi no Shizuku" which is resistant to discoloration and deterioration, and "Houseki no Shizuku" coloring agent to maintain transparency. I make each one carefully, but as it is a handmade item, there may be some air bubbles, fiber inclusions, or slight overflows. It does not have the durability of a mass-produced product, so please refrain from purchasing if you are concerned or if you are looking for perfection. Please refrain from purchasing if you are allergic to resin. Please do not place it in direct sunlight for long periods of time or in places with high temperatures or humidity, as this may cause deterioration or discoloration. Silver Clouds Rainbow Sphere Healing