Ha glad you asked, my probly top ten would be sulphides,onionskin,lutz,chevron,christensen,akro agate,popeye,latticino,indian,stone agates. I am also VERY intersested in tht 40 year collection i would pay ANYTHING and trust me im serious just not over $7000.00 ha what about you what are your favorites you seem very nice i am pretty new to colecting but turns out iv been doing it since i was 5 who knew?