Diamond
Smooth
Reflections occur when light bounces of a smooth and shiny surface. Glass mirrors have a thin layer of silver on the back so that light is reflected.
Raw diamonds are not naturally smooth, but may have smooth faces: a polished diamond gemstone is smooth.
level
smoother
Diamond
a conchoidial fracture is a "shell-like" fracture with a smooth curved surface
Amethyst fracture refers to the way amethyst gemstones break or shatter when subjected to external force. It typically exhibits conchoidal fracture, which means it breaks in a smooth, curved manner like the inside of a seashell. This fracture pattern is a characteristic of many minerals and gemstones, including amethyst.
Cleavage is when you can break the rock into square like pieces and Fracture is when you break a rock into uneven different shaped pieces.
Obsidian is a natural glass, often formed in volcanoes. It has a smooth glassy texture, and will commonly fracture with a curved fracture plane called conchoidal fracture, after the resemblance to the shape of a shell. Usually black because of the trace iron content.
conchoidal fracture
Cleavage in minerals is the tendency of the mineral to break across a definite plane, creating a smooth surface. Two minerals with cleavage are granite and shale.
Yes
Cleavages
Cleavage
Cleavage- splits easily along flat surfaces.Fracture- is smooth and curved or jagged with sharp edges.http://wiki.answers.com/What_is_the_difference_between_cleavage_and_a_fracture#ixzz19zTPVGaj
The fracture of an opal can be hard or smooth , An opal can have as many fractures as any other mineral can . Sometimes opal can be smooth , sometimes they can be hard . The fracture of an opal is hard and smooth .