My name is Walter Kellogg. I have been collecting minerals as a hobby since the age of 5. That makes nearly 60 years. I have been selling minerals at gem and mineral shows as a full time business since 1995 and part time for a few years before that. My wife, Maryann, occasionally helps me, so that is where the name M&W came from.
If there is anything in particular you would like - email me - you never know.