Process manufacturing produces co-products and by-products. A co-product is a saleable end item that results from a process. A by-product is a material of value that is produced incidental to or as a residual of the process.
D. a rock with metamorphic minerals but no foliation or lineation. A shale is metamorphosed into three rock types: (1) a banded gneissic rock; (2) a rock with small mica crystals with a shiny aspect; (3) a very shiny rock with large mica crystals; and (4) a dull slate with cleavage. Which of the following lists these rocks in order of increasing metamorphic grade?
1 Non-metallic-all the other ways that a mineral can shine. 2  Glassy/vitreous-shines like a piece of broken glass (most common non-metallic). 3  Dull/earthy-no shine at all. 4  Resinous/waxy-looks like a piece of plastic or dried glue.5  Pearly-looks oily it may have a slight rainbow like an oil slick on water. Glassy/vitreous-shines like a piece of broken glass (most common non-metallic). 2  Dull/earthy-no shine at all. 3  Resinous/waxy-looks like a piece of plastic or dried glue. 4  Pearly-looks oily it may have a slight rainbow like an oil slick on water.