I purchased a rather large slab of Picture Agate, but have yet to get it lapped. I have had good results with other agates, so I felt justified in getting a pretty piece, since I could look for a lifetime and not find one that compares. Plus, it could very reasonably be displayed in the bathroom. Truly picture quality.
I recently picked up some Owyhee jasper (it's one of the picture jaspers also, similar to Biggs jasper). I also have Fortification agate, some Rainbow Fluorite, and of course the Apache Black Gila:
Of them all, the Fluorite is some amazing stuff!! The crystalline structure is much, much different from the others...and it does some really interesting things to the edge. The small piece you see in the picture above was $10 shipped lol. It's capable of taking a razor from HHT1 to HHT4 on its own, using my saved beard length hairs (when I first started shaving I used clippers on my 2" long beard and saved them lol) as a control. I will be shave testing the fluorite edge tonight using the customized Kikuboshi 24 and Gold Dollar 66 in the picture, both of which I dulled on glass and refinished on the Fluorite.
I'll let you all know how it goes .