We try to think of others, but ultimately we are all at the center of our own solar system. Think of it as- you are the Sun, and you are being orbited by the Earth and the Moon. Well, that is the effect we were after, anyway..... The Moon is the clasp so the spacial relationships are always changing. This necklace is constructed in sterling silver and can be made in many different lengths and types of arrangements. Pricing ranges from 100- to 250-.