My name is Dan Zellner and selling minerals is my life's passion / obsession. My goal is to provide collectors with quality minerals at affordable prices. My selection of minerals is in line with my own diverse collecting interests and ranges from USA classics, new worldwide finds, historic mines, oddities, fluorescents, and simply aesthetic pieces. I have been privileged to work with a number of high end collectors and museums across the country to help them obtain high quality specimens for their collections.

My academic background includes a Masters in Mining Engineering from the Colorado School of Mines and an undergraduate degree in Chemistry with a minor in Geology from UC Santa Barbara. I have worked as an engineer designing underground construction projects and mines in the USA and around the world. I have been collecting and selling minerals for 20 years. However, I always have held a full time job as an Engineer. That changed when I decided to pursue becoming a full time mineral dealer and left the mining industry. I have always loved meeting new people, seeing new collections, and learning more about minerals. My business ethics in both mining and minerals have always been centered around trust, honesty, and integrity. I like to work with people who have a real passion for minerals, to learn about their interests, and to provide them with quality specimens that meet their collecting criteria. If you are interested in adding to, upgrading existing specimens, or downsizing your mineral collection, please feel free to reach out to me at dan@danzrockshop.com