What is Agate?
{{Infobox mineral | name = Agate | category = Quartz variety | boxwidth = | boxbgcolor = | image = mossagate.pebble.750pix.jpg | imagesize = | caption = Moss agate pebble, 2.5&nbsp;cm (1&nbsp;inch) long | formula = Silica, SiO<sub>2</sub> | molweight = | color = White to grey, light blue, orange to red, black. | habit = [[Cryptocrystalline]] silica | system = [[Rhombohedral Microcrystalline]] | twinning = | cleavage = None | fracture = [[Conchoidal]] with very sharp edges. | mohs = 7 | luster = Waxy | refractive = 1.530-1.540 | opticalprop = | birefringence = up to +0.004 (B-G) | pleochroism = Absent | streak = White | gravity = 2.58-2.64 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = | other = }} '''Agate''' is a kind of [[quartz]] and it is a [[mineral]]. Agate can come in many different kinds and colors. Agate deposits are primarily found in large rocks such as boulders. They take ~50 million years to form. It is characterized by colored band patterns inside various rocks. Often, agates are also accompanied by [[Amethyst]] deposits inside.<ref>{{Cite book|url=https://books.google.com/books?id=zmF-CgAAQBAJ&dq=agate+with+amethysts&pg=PT18|title=Semi-Precious Stones - A Historical Article on Agate, Amber, Amethyst and Many Other Varieties of Gemstones|last=Streeter|first=Edwin W.|date=2014-07-07|publisher=Read Books Ltd|isbn=978-1-4733-9436-0|language=en}}</ref> ==References== {{reflist}} [[Category:Minerals]]