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?
Only one Igneous rock is shiny that's obsidian and the reason its shiny is because since its extrusive rock it cools faster since Earths surface is cooler than the areas aroun â¦ d the core so it cools fast so not enough crystals can form so it looks like black glass.nly one Igneous rock is shiny that's obsidian and the reason its shiny is because since its extrusive rock it cools faster since Earths surface is cooler than the areas aroun â¦ d the core so it cools fast so not enough crystals can form so it looks like black glass.