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while the underlying host rock is densely studded with independent quartz grains
Kyanite from Minas Gerais State
本热液共生矿物标本产自缅甸掸邦佤邦地区，主体为透明六方柱状水晶，晶形完整，玻璃光泽清晰。鲜亮天蓝色异极矿完整覆盖于水晶晶体表面，具层状放射结晶构造，质地呈现柔和丝绢光泽。无色通透水晶与浓郁蓝色异极矿覆层形成鲜明视觉对比，是缅甸多金属热液矿床极具特色的共生矿物组合。
Dimension: 7×6
Dimension：17×11×9
15 pcs Pyrite Concretion sales while the underlying host rockPyrite Concretion (also called Iron Gall Stone from Xiaohcun, Dongchuan District, Kunming City, Yunnan Province, China. Geological horizon: Cambrian carbonaceous mudstone and siltstone sedimentary strata. These spherical aggregates are formed by pyrite microcrystals gradually precipitating and growing around organic debris in ancient marine sedimentary environment. The crystals are compactly intergrown, presenting fine metallic luster and regular
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