Ferruginous quartz cluster Siderite Approx weight: 320g

Approx weight: 320g

Many of these specimens are speckled with small pits on the faces

but do not lick it or put it in your mouth

Approx weight: 6 lbs 4 oz

snaking chalcedony with concentric rings visible

Ferruginous quartz cluster Siderite Approx weight: 320gLocale: 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