4mm -- 0.5 0z/17g  -   Real citrine, NOT Hta/baked amethyst. Think, solar plexus - will power, calming which in turn calls in higher health, prosperity, and abundance. It's a good crystal to use if you're looking to attract success, courage and inner strength.
 
** What is hta? Citrine is a close cousins of amethyst, there is a baking process or Heat Treated Amethyst that changes the color from purple to a darker orange...properties are similar.  
 
** What is AmeTrine...Natural Ametrine, are clusters where the natural heat of the location, started to perform the process and you get natural bands of Amethyst in gradiant color change down to the darker orange/yellow hues.