After extensive searching this past summer, I ordered the following kits from Home Science Tools. I have been 100 percent happy with them. Be sure to check the Web for a coupon before ordering!
Also, if your community has a cave nearby, check their gift shop for specimens.
|Rock Study Kit, 15 Specimens|
|Mineral Study Kit, 15 Specimens|
|Geology Field Trip in a Bag - We use these specimens for general sorting, etc. activities where it's not imperative that we know what the specimens are. We also use them for activities involving water. The samples from the other kits have paper identification tags attached to them.|