Male & Female
Fancy stone. The symbol for female - derived from the astrological symbol for Venus - used since the Renaissance. In alchemy - used to represent copper. It is possible that the origin of the shape was a hand mirror or a distaff - a tool used in spinning for holding flax or wool prior to being spun.
The Male or Mars symbol is a depiction of a circle with an arrow emerging from it, pointing at an angle to the upper right. In old manuscripts, it is usually interpreted as the shield and spear from the war god Mars/Ares. It was also the alchemical symbol for Iron.