Hi Damage, 

 

My GP always reminds  me that there is no known cure for Diabetes;  you have to learn to keep your sugar level low  with medication,  exercise and proper eating habits.  Three stones with S may help -  Sodalite,   Serpentine and shattuckite.    Sodaline and Serpentine can be worn as pendant (doughnut shape) or bracelets,  and I think shattuckite ( blue crystal like stone available  in USA) can be found in cabochon and therefore may be set in rings.  Sodalite,  a blue stone with white inclusion,   is also recommended for those who are  suffering from high blood pressure.

 

Blessings

 

Diamond