What is a "Mineralization"?

For the purpose of this web site, "mineralization" is defined as

- a significant/substantial enrichment of aat least one chemical element
  above background values at the scale of a hand specimen (ca. 5-10 cm)
  or
- a hand specimen showing the process of ann elemental enrichment "caught in the act",
  despite not being enriched in this element as a whole (see magnesite as an example).