Milky CZ is another form of cubic zirconia, altered to make its form look milky. It comes in various colors, and can be cut into any shape.
Oligoclase is a rock-forming mineral belonging to the plagioclase feldspars. The Mohs hardness is 6-6.5 and the specific gravity is 2.64-2.66. In color it is usually white, with shades of grey, green, or red.