These necklaces are great for fancy or casual wear.  The center pieces are  dyed jasper pieces and the rest of the necklace is  magnetic hematite.  The magnetic hematite ensures a better fit and that it will adhere to itself.  It also enables you to wear these pieces as either chokers or regular necklaces, or anywhere in between.
 
Hematite is a natural material known for its calming and stress relief properties as well as  enhancing blood circulation.  It has been known to reduce headaches, blood pressure problems, and negative emotions.
 
material: natural stone
 
Fits almost anyone.  This is due to the fact that is is made out of memory wire, which can stretch to fit almost any size neck and go back into its original shape. The blue and green necklaces will best fit a small to large neck, while the red one will best fit a small to 2xl neck.