Yes, of all the ID options for your snail, ALL of them are reef safe. Abalones have pretty big appetites for algae, and change the color of their shells based on the color of the algae they eat. Also, abalones, particularly the small species, are much rarer tank inhabitants than Stomatella snails or related trochids. They aren't extremely rare in the wild, but they are very well camouflaged, and are hard to spot and collect. The animals of several of the small species have only rarely been photographed. Yours looks like it may be a juvenile Haliotis ovina, however, which is probably the most common of the tropical abalones that show up in reef tanks. It's an interesting animal in any case.
Cheers,
Don