These are the cache icons Cachly uses in the List View.
The Map View pins all have the shape of the teardrop icon used by Cachly for the App. The color of the pin reflects the icon type.
Note that cache pins and icons in the cache details may have a decoration for things like corrected coordinates, DNF, FTF. Here are some you may see:
Note: Archived caches have an X in the center of the pin on the Map and a strike-through of the title in the title in the Cache Details.