※ 引述《TeaBags (茶包)》之銘言： : 推 duan:那...那粉圓有可能是什麼造成的咧?? 愈來愈疑惑了..... 07/11 17:36 貼個國外網站的解說，抱歉茶包英文不好，只能大概描述.... Rhyolite is an igneous rock, rich in silica. As it cools, sometimes the silica starts to precipitate out of the magma, forming little spherical balls. This type of formation is easily recognizable in the aforementioned jaspers. If these balls or "globs" of silica-rich magma are allowed to grow larger before the whole mass becomes solid, they can crack and shrink forming what later may become Thundereggs. Ocean Jasper has a typical rhyolite formation except that the entire mass has somehow been converted to pure silica (agate, jasper, quartz). The descriptions "silicated rhyolite", petrified rhyolite, or agatized rhyolite are non-sensical but take on a generally understandable meaning when viewing this rock. To my knowledge, there has never been a material like this available before. 資料來源：http://www.thegemshop.com/o_jasper.htm 大意是當富含矽質的流紋岩開始冷卻，其中矽質成分開始從熔岩中冷卻凝固結晶出來的 時候有時候會形成一些小球，而這些小球被之後冷卻結晶的矽質成分包裹住之後，就形 成像是海洋碧玉這樣的型態。 因此裡面同心圓狀的紋路其實原本是矽質的球狀結晶體，而且是在高溫的熔岩中產生， 珊瑚卵或者粉圓如果可以耐這種高溫也是粉神奇的啦.... ^_^ -- http://www.stonexp.idv.tw 石探紀：茶包的礦物化石網 http://tw.bid.yahoo.com/booth/teabags_0525 石探紀：茶包的網拍賣場 http://tw.myblog.yahoo.com/teabags_0525 石探紀：茶包的部落格 --

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