The Solar System Necklace is a Ultra-Rare Pet Wear in Adopt Me! It originated from Accessory Chest. 

Type	Pet Wear
Rarity	Ultra-Rare
Origin	Accessory Chest

The Solar System Necklace can otherwise be obtained through trading. The value of Solar System Necklace can vary, depending on various factors such as market demand, and availability. It is currently about equal in value to the Water Can.

Check Out Other Trading Values:- Adopt me Trading Value