These UV Sodalite Palmstones are approximately 42 x 61 mm; thickness is approximately 27 mm, weight is approximately 111 grams. Please note these will be a random pull and the above dimension it for reference only each palmstone does have a different measurement. There are six in total. 
 
UV Sodalite or Fluorescent Sodalite was found around Lake Superior in 2017. Also, known are Syenite Sodalite. Can be found in China, Canada and USA. It has a Mohs of 6 and color is black/grey. Will react to UV 365nm light.