Mesh is manifold, no holes, no bad contiguous edges.
Measure units are millimeters, it is about 3 cm in diameter.
Here is two version of the crescent:
1) Crescent_II. with rough textured surface, 234758 triangular faces.
2) Crescent_II_tx. with smooth surface 293642 triangular faces.
Available formats : .blend, .obj, .stl, .fbx, .dae
Cycles materials that was used for rendering is available in .blend file.