※ 引述《TeaBags (茶包)》之铭言： : 推 duan:那...那粉圆有可能是什麽造成的咧?? 愈来愈疑惑了..... 07/11 17:36 贴个国外网站的解说，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. 资料来源：http://www.thegemshop.com/o_jasper.htm 大意是当富含矽质的流纹岩开始冷却，其中矽质成分开始从熔岩中冷却凝固结晶出来的 时候有时候会形成一些小球，而这些小球被之後冷却结晶的矽质成分包裹住之後，就形 成像是海洋碧玉这样的型态。 因此里面同心圆状的纹路其实原本是矽质的球状结晶体，而且是在高温的熔岩中产生， 珊瑚卵或者粉圆如果可以耐这种高温也是粉神奇的啦.... ^_^ -- http://www.stonexp.idv.tw 石探纪：茶包的矿物化石网 http://tw.bid.yahoo.com/booth/teabags_0525 石探纪：茶包的网拍卖场 http://tw.myblog.yahoo.com/teabags_0525 石探纪：茶包的部落格 --

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