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snaking chalcedony with concentric rings visible
Approx weight: 6 lbs 4 oz
cementing it all together with sedimentary debris
I'm not hip enough on my crystallography to tell you what types of twinning we are looking at
Many of these specimens are speckled with small pits on the faces
Ferruginous quartz cluster Siderite snaking chalcedony with concentric ringsLocale: Morocco Approx dimensions: 4. 5 x 3 x 3", longest crystal 5. 5 cm Approx weight: 627g Known as red or ferruginous (iron bearing) quartz, this unusual variety of quartz gets its color from iron oxides, typically hematite. The quartz in this specimen initially grew colorless; broken crystals along the edge reveal the quartz crystals have a clear core bordered by a thin top layer of brick red quartz. A change occurred during the growth process
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