What are obsidian,diorite,basalt,and ryolite rocks used for?
Obsidian is used in cardiac surgery, as well-crafted obsidian blades have a cutting edge many times sharper than high-quality steel surgical scalpels Obsidian is also used for ornamental purposes and as a gemstone Diorite Building stone, polished slabs, once was used for many rocks which are now called by other names. For example, Diorite Porphyry (sp. grav. = 5, gray, green, or reddish) includes hornblende and biotite and quartz as well as plagioclase, and is a hypabyssal igneous rock commonly found in association with granite plutons and dikes (as in Scotland). Basalt can beDecorative stones, or the lava rocks for grills and ovens. If the rhyolite contains numerous holes or vesicules, then the rhyolite is called pumice, which is used for numerous things, dental work, cleaning cloths (jeans), put in certain hand soap (for auto mechanics), used in spas like to foot smoothers. Rhyolite often is found with flow banding “frozen” into the rock. This lends to uses as decorative rocks and ev
