Includes photos of fluorescent minerals, reference sources, and links.

Image libraries and some information on zeolites (mostly from India) and their associated minerals.

An interactive reference guide to rocks, minerals, and gemstones.

Educational articles, reports about collecting locales, images, and other resources for collectors of minerals and fossils.

Volker Betzon provides information and photographs of natural zeolites, references on zeolite locations and offers exchange with other collectors.

Information on the properties, occurrences, and some specific research of the mineral Zircon.