Hello every one, i am new on this forum and i found many rocks and other minerals here in the Netherlands EU. The first mineral is like glassy looks, but i receive that on the side of it there are a structure if you see, and it goes from square to triangle how is that possible ? Then on the other picture you see the skin of this mineral, i do that with some Diamond pasta on a drill brush for hobbyist a dremell tool. now the reason why i do this, because i do this also on a piece of glass and see the different between the result of it, glass will look like milky, but this mineral you can see is like it hold together and dont let go of. Also with a Diamond drill head and make a line or curve on it, glass is very splintery and this mineral don"'t splintery also no dust get off.
Photo nr.1 this is the mineral where i talk aboud it. Also you can see on one side there are some crow lines on it stepp likes picture 2, 4, 6, 7, and on photo 8.
Square to triangel are on photo, 5, 9, 10,11, and 12.
Skin like are photo, 14, and 15. Its meets 3cm long, 2cm wide, 2 and a halfcm hight. Its weight 16,4gr.