Apart from selling on e-rocks I am a passionate field collector.
Everybody else doing so knows how difficult it can be to collect at a new locality.
When the new e-rocks was introduced I was really happy to use the database function. You can search for localities and minerals.
The big advantage of this system is, that the detail pictures of the object of interest (e.g. crystal) is always linked with the matrix.
Collecting at a new locality is usually associated with finding the correct hosting rock. This is now made easy with the help of e-rocks.