Black magnetite octahedra, some with traces of chlorite on their faces, some of which are stepped. Some magnetite crystals are completely encased in chlorite. Blocky orthoclase crystals form part of the cavity lining. Brown sheaf or club-shaped siderite, yellow hexagonal chabazite-Na, and needles of apatite coated with chlorite. Below: Magnetite,...
Bickers Quarry (originally described as Simpkins Quarry) has been owned by Mr. S. Bicker. It is on the north side of Tokatoka Road, a short way east of the junction with Simpkin Road, about 3.5km northeast of Tokatoka (Fig 1 and Fig 2). Tokatoka is about 15km southeast of Dargaville...
Octahedral magnetite crystals with yellowish chabazite and dark brown siderite. Chabazite-Na (“herschelite“) crystals are found in many vugs, as single yellowish, cream, white or colourless hexagonal plates, with striated prism faces and matt-finish flat surfaces. Under magnification the flat surfaces are shown to be made of many tiny points. These...
