4mm - 0.5 oz/15g.  Lepidolite comes in a few shades, mica/lithium and other variations contribute to the color changes.  Encourages independence for setting and attaining goals inconspicuously. Provides protection from outside influences. Relieves every day stress, and promotes restful sleep when placed near your pillow. Attracts good luck to those who carry it, and drives away negativity.  Supports joint concerns... When used with rose quartz, it becomes a stone of reconciliation of love.