![Jolyon Ralph](https://dtdi.carnegiescience.edu/sites/default/files/_b5bzksO_400x400.jpeg)
Jolyon Ralph
MinDat.org Manager
Links:
Jolyon is the founder of mindat.org. He started mindat as a personal mineral information database in 1993, which was later launched as a web site in October 2000. He also runs the gemdat.org website.