Hello I wasn't sure if I should post this in minerals instead, but let's check it out here.
Found in Paramali, turtle beach, east of akrotiri area, when facing north. It is obvious that I found the two pieces of a cracked single. The 'eye' shape in 1b, matches the location of the whiter spots inside.
Also, the whites inside, are surrounded by small parallel lines. on the photo, they are more visible on the left side, but they exist on both.
Something else you can see, is that the 2 external sides are pretty much negative of each other, regarding coloring.