Bookmark - Background Pattern Series, Honister Slate

Know I've posted one or two bookmarks with background patterns, but decided to go ahead and do a series to feature the remainder of those created so far.  This was captured at the Honister slate mines of the Lake District in England.  They say the slate here is unique in that it has a greenish tint that can't be found anywhere else.  Andrew and I picked up a few of these rocks to distribute to family and friends back home.