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With the extra time that I have at home due to Covid-19, I have been better organizing my fossil collection. The vast majority of my micro shark, ray, and bony fish specimens are in gem jar displays. I use mostly white (I use black for light colored teeth) displays with 24 (1.75 inch diameter) jars or 50 (1.25 inch diameter) jars to display these micros. Below are examples of a black 24 jar display and a white 50 jar display: I have these displays in drawers in map chests. I have currently 194 gem jar displays in 6 map chests. Below is a picture of a representative drawer and one of my four low map chests. I also have two high map chests: Displaying my micros this way is really costly (cost of gem jar displays and map chests). It also takes up a lot of room space. I just recently put coin holders with micro specimens that I received as a gift from researcher Gerard R. Case and that I received in trade from renown French collector and researcher Pierre Zennaro into coin holder sheets. Please see the pictures below: 2 inch by 2 inch coin holders from Pierre Zennaro with mostly Moroccan specimens in two 20 coin holder sheets: 2 inch by 2 inch coin holders from Gerard R. Case with USA specimens from New Jersey and Wyoming in a 20 coin holder sheet: I want to point out the advantages of using coin holders over gem jar displays for micro shark, ray and bony fish specimens. It is much cheaper to use coin holders, coin holder sheets, 3 ring binders and book shelves then costly gem jar displays and map chests. The coin holder binders take up much less space than the gem jar displays. I could easily fit my micros on a single bookcase versus six large map chests. In the coin holders you can see both sides of the specimens versus only the up side in a gem jar display. However there are disadvantages to the coin holders as it is more difficult to put the larger micros in coin holders but you can use sliver dollar and half dollar coin holders for larger specimens. However, coin holders would not work for larger, really thick specimens. It is easy to put a single species id on the coin holder but it gets a lot harder if the coin holder has a bunch of species in it. It gets harder to add all of the other information (time period, collecting site, formations etc.). In my gem jar displays I put a number on the bottom of the gem jar and then have a separate word document for each gem jar display that has all the information that I want to include by gem jar number. I then put a hard copy of this document in each gem jar display under the foam. You could put a number on each coin holder and do something similar and put the word document in the 3 ring binder with the coin holder sheets. However the biggest disadvantage is if you wish to add or remove specimens from a coin holder. You need to remove at least one staple and then restaple the coin holder. If you don’t plan on removing or adding specimens this isn’t a problem. However, I often add specimens to my gem jars as I find more of a species and I often remove specimens to take pictures of them. I also store labeled baggies of the more worn and damaged specimens from the same site in my map chest drawers also with the gem jar displays and also store Riker mounts and individual macro specimens. So I would still need map chest storage. If I had the chance to start again, I probably would use coin holders for my smaller, thinner shark, ray and bony fish micros. Marco Sr.