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Ships within 48 hours · Estimated delivery Jul 26 - Jul 31
Dimension: 7×6
The color distribution on each piece is unique
Kyanite from Minas Gerais State
Tiny iron oxide stains dot partial crystal faces
while the underlying host rock is densely studded with independent quartz grains
15 pcs Pyrite Concretion sales Dimension: 7×6Pyrite 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