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| White mesolite needles with a green apophylite crystal at the base; also some stilbite crystals at the bottom. The piece comes from Poona, India and is 6 inches across. Mesolite is a mineral in the category called zeolites, a kind of silicate less stable than quartz. The fineste zeolites in the world come from rock quarries in the Bom bay-Poona regions of India. This specimen was obtained from Dr. J. Zaveri in Bombay. |
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 | A larger"twinned" calcite crystal in a setting of smaller calcite crystals; 3 inches across. It comes from Elbingerode in the Harx mountains of Germany. Calcite is quite a common mineral, yet desirable for collectors. Usually, it is not very expensive, and it occurs in a number of crystal forms and in many colors. Calcite may be opaque, as it is here, or transparent. The main crystal in the illustrated group is twinned, which lends a special character to the piece. |
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 | Rhodochrosite, polished section, from Catamarca, Argentina; 3 1/2 inches in diameter. |
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