Gypsum tends to usually occur alone or with barite, chabazite-Na and analcime in the more weathered rock. It forms sprays of clear needles, or larger flat crystals. Below: Gypsum, siderite…
Chabazite-Na, Bickers Quarry, New Zealand
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…
Barite, Bickers Quarry, New Zealand
Barite occurs as white tabular plates or rosettes, on chlorite and in weathered zones, and as chunky white bipyramids. Barite can be found with chabazite, gypsum, analcime, and harmotome-phillipsite. Below:…
Chabazite-Na, Bickers Quarry, New Zealand
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…
Apatite, Chabazite-Na, Chlorite, Bickers Quarry, New Zealand
Apatite occurs as fine needles, often coated with brown chlorite. Occasionally it is strung with tiny “herschelite” (chabazite-Na) crystals. Below: Prismatic coated apatite crystal with yellow hexagonal chabazite-Na and orange…
Analcime, Bickers Quarry, New Zealand
Analcime is found as small water-clear trapezohedra, occasionally with white cores, and often with square c-faces. Larger crystals are usually crackled and clouded. It is associated with most other minerals,…
Analcime, Bickers Quarry, New Zealand
Analcime is found as small water-clear trapezohedra, occasionally with white cores, and often with square c-faces. Larger crystals are usually crackled and clouded. It is associated with most other minerals,…
Bickers Quarry, Northland, New Zealand
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…
Chabazite-Na, Siderite, Magnetite, Bickers Quarry, New Zealand
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…
Calcite, Moeraki Point, Otago, New Zealand
Calcite is abundant, and often is the only mineral in a cavity. It generally grows directly on the vugh walls, but also occurs on phillipsite, and may have phillipsite, erionite…
Quartz, Calcite, Moeraki Point, New Zealand
Quartz occurs as small prismatic crystals or drusy coatings on other minerals. There are also seams of agate at Moeraki Point. Below: Small colourless quartz on white calcite, on brown…
Phillipsite-K, Calcite, Moeraki Point, New Zealand
Twinned phillipsite crystals on and with calcite. Ex Jo Price Collection. Below: Phillipsite on calcite, Moeraki Point, Otago, New Zealand. Width of view 5.75mm.