A Circle with a dot in the center is an ancient astronomical, astrological solar symbol that represents the Sun. 

Sonia Tonkin Inspired by this particular symbolic Sun representation designed an entire jewelry collection of wearable amulets, this original designs have become the signature pieces that she is sought after and known for

It’s All About the 

Sun!

This particular symbol was once the alchemical symbol for gold as well. The symbol association with both the Sun and Gold dates back as far as alchemy itself. The symbol of Helios who as God of the Sun, could see and hear everything. The color of gold was associated with the brilliance of the Sun from beginning of times, gold the noble metal was name after Sol, the golden Sun whose symbol was the perfect sphere. The dot or point in the center of a circle symbolizes the blending of male and female forces.