As Larry has previously pointed out, this is a thumbnail group and the pictures posted should be of thumbnails only. If this request is not heeded, we will have to do some "censoring" in order to keep this from becoming just another commercially abused useless advertising page for all kinds of unrelated specimens or worse. Up to now there are at least a quarter of the specimens pictured that are larger than 30mm and definitely do not fit in a thumbnail box. There are also dealers showing lots of minerals rather than individual specimens.
So, the currently voluntary rules are:
Thumbnail specimens only, there are plenty of other sites on the internet for other categories
Photo caption information to include species, locality, size, and any other relevant information
There should be only one specimen in a photo
Items for sale are allowed, but should be limited to periodic posts - do not abuse the priviledge