Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
搜索矿物的性质搜索矿物的化学Advanced Locality Search随意显示任何一 种矿物Random Locality使用minID搜索邻近产地Search Articles搜索词汇表更多搜索选项
╳Discussions
💬 Home🔎 Search📅 LatestGroups
EducationOpen discussion area.Fakes & FraudsOpen discussion area.Field CollectingOpen discussion area.FossilsOpen discussion area.Gems and GemologyOpen discussion area.GeneralOpen discussion area.How to ContributeOpen discussion area.Identity HelpOpen discussion area.Improving Mindat.orgOpen discussion area.LocalitiesOpen discussion area.Lost and Stolen SpecimensOpen discussion area.MarketplaceOpen discussion area.MeteoritesOpen discussion area.Mindat ProductsOpen discussion area.Mineral ExchangesOpen discussion area.Mineral PhotographyOpen discussion area.Mineral ShowsOpen discussion area.Mineralogical ClassificationOpen discussion area.Mineralogy CourseOpen discussion area.MineralsOpen discussion area.Minerals and MuseumsOpen discussion area.PhotosOpen discussion area.Techniques for CollectorsOpen discussion area.The Rock H. Currier Digital LibraryOpen discussion area.UV MineralsOpen discussion area.Recent Images in Discussions
Identity HelpDisrupted agate? From Lake Superior
28th Feb 2012 22:55 UTCMoe Hawk
28th Feb 2012 23:34 UTCRowan Lytle
28th Feb 2012 23:57 UTCPaul Brandes 🌟 Manager
What you have is something called a Brecciated Agate, also sometimes called a disrupted agate. They form when the original agate got partially crushed, breaking up the banding and scattering them around within the vesicle or rock itself. It is thought that any remaining silica solution in the rock then filled in the spaces and healed the rock to form one solid specimen again. The drusy quartz likely formed during the re-healing stage.
I don’t see any calcite in the specimen; it appears to be all quartz. The red colour reminds me more of rhyolite, which is also a common matrix of agate, although basalt can also have a red tint as well.
Neat specimen at any rate!! (tu)
1st Mar 2012 13:46 UTCRaymond Hietapakka
2nd Mar 2012 00:26 UTCMoe Hawk
版权所有© mindat.org1993年至2024年,除了规定的地方。 Mindat.org全赖于全球数千个以上成员和支持者们的参与。
隐私政策 - 条款和条款细则 - 联络我们 - Report a bug/vulnerability Current server date and time: 2024.4.23 15:09:43
隐私政策 - 条款和条款细则 - 联络我们 - Report a bug/vulnerability Current server date and time: 2024.4.23 15:09:43