Siderite on pyrite pseudomorph Fluorite " Thick lava-like ropy banding

" Thick lava-like ropy banding create the raised cup of chalcedony with a hollow interior

Approx size: 700g (1

it is perfectly safe to have around as part of your collection

Dark striping is iron banding

where there is a small raised ring with more subtle banding radiating out around it

Siderite on pyrite pseudomorph Fluorite " Thick lava-like ropy bandingLocale: 10 Silicate ore body, Potos Mine, Santa Eulalia, Chihuahua, Mexico Approx dimensions: 4 x 2. 25 x 2. 25" Approx weight: 608g (1 1 3 lb) This specimen from the Potos Mine has orange yellow siderite on a heavy base. The siderite has formed blade like growth criss crossing the surface, with small pyrite crystals sprinkled throughout. The heavy base is composed of tapered hexagonal barrel crystals. The large hexagonal formation is characteristic