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7 - NOTES ON MINOR COLLECTIONS

Published online by Cambridge University Press:  05 March 2012

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Summary

  1. 1. Cubic colourless Fluor, coated with opaque carbonate of lime, and formed on a base of curved plane quartz.

  2. The whole on base of green fluor, with crystals of galena.

  3. (Note the rounding off like the division of the margin of a leaf—instead of straight superimposed layers, the common form.)

  4. 2. Curved plane Quartz (? I am not sure if each small plane is curved or only the general form arrived at), formed in a nodule of agate and amethyst quartz.

  5. 3. Right plane quartz—aggregate in crusts (unusual).

  6. 4. Common Quartz in a close crust, with block Tourmaline and apatite (the hexagonal white thing)—phosphate of lime.

  7. 5. Common Globular agate, throwing itself into zones with Quartz outside (dyed brown artificially and spoiled in colour, but the lines of it better seen).

  8. 6. Common globular agate (variety I have called folded) with quartz inside.

  9. 7. Common agate—neither globular nor folded, but even, all round, and only following irregularities of matrix.

  10. 8. Purple agate with several interferent concretions. Very pretty.

  11. 9. Common Grey Chalcedony.

  12. 10. Purple Chalcedony on Quartz. (Cornwall and Cornwall only in this form.)

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Publisher: Cambridge University Press
Print publication year: 2010
First published in: 1906

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