Book contents
- Frontmatter
- Contents
- LIST OF ILLUSTRATIONS
- INTRODUCTION TO THIS VOLUME
- I ON THE FORMS OF THE STRATIFIED ALPS OF SAVOY (1863)
- II NOTES ON THE SHAPE AND STRUCTURE OF SOME PARTS OF THE ALPS, WITH REFERENCE TO DENUDATION (1865)
- III ON BANDED AND BRECCIATED CONCRETIONS (1867–1870)
- IV DEUCALION: COLLECTED STUDIES OF THE LAPSE OF WAVES AND LIFE OF STONES (1875–1883)
- V ON THE DISTINCTIONS OF FORM IN SILICA (1884)
- VI CATALOGUES OF MINERALS
- 1 CATALOGUE OF A SERIES OF SPECIMENS IN THE BRITISH MUSEUM (NATURAL HISTORY) ILLUSTRATIVE OF THE MORE COMMON FORMS OF NATIVE SILICA (1884)
- 2 CATALOGUE OF MINERALS IN ST. GEORGE'S MUSEUM, SHEFFIELD (1877–1886)
- 3 CATALOGUE OF FAMILIAR MINERALS IN THE MUSEUM OF KIRKCUDBRIGHT (1884)
- 4 CATALOGUE OF THE COLLECTION OF SILICEOUS MINERALS GIVEN TO AND ARRANGED FOR ST. DAVID'S SCHOOL, REIGATE, BY JOHN RUSKIN (1883)
- 5 CATALOGUE OF MINERALS PRESENTED TO THE CONISTON INSTITUTE (1884)
- 6 CATALOGUE OF MINERALS SHOWN AT EDINBURGH (1884)
- 7 NOTES ON MINOR COLLECTIONS
- VII THE GRAMMAR OF SILICA (not hitherto published)
- APPENDIX: LETTERS, ADDRESSES, AND NOTES
- INDEX
- Plate section
4 - CATALOGUE OF THE COLLECTION OF SILICEOUS MINERALS GIVEN TO AND ARRANGED FOR ST. DAVID'S SCHOOL, REIGATE, BY JOHN RUSKIN (1883)
Published online by Cambridge University Press: 05 March 2012
- Frontmatter
- Contents
- LIST OF ILLUSTRATIONS
- INTRODUCTION TO THIS VOLUME
- I ON THE FORMS OF THE STRATIFIED ALPS OF SAVOY (1863)
- II NOTES ON THE SHAPE AND STRUCTURE OF SOME PARTS OF THE ALPS, WITH REFERENCE TO DENUDATION (1865)
- III ON BANDED AND BRECCIATED CONCRETIONS (1867–1870)
- IV DEUCALION: COLLECTED STUDIES OF THE LAPSE OF WAVES AND LIFE OF STONES (1875–1883)
- V ON THE DISTINCTIONS OF FORM IN SILICA (1884)
- VI CATALOGUES OF MINERALS
- 1 CATALOGUE OF A SERIES OF SPECIMENS IN THE BRITISH MUSEUM (NATURAL HISTORY) ILLUSTRATIVE OF THE MORE COMMON FORMS OF NATIVE SILICA (1884)
- 2 CATALOGUE OF MINERALS IN ST. GEORGE'S MUSEUM, SHEFFIELD (1877–1886)
- 3 CATALOGUE OF FAMILIAR MINERALS IN THE MUSEUM OF KIRKCUDBRIGHT (1884)
- 4 CATALOGUE OF THE COLLECTION OF SILICEOUS MINERALS GIVEN TO AND ARRANGED FOR ST. DAVID'S SCHOOL, REIGATE, BY JOHN RUSKIN (1883)
- 5 CATALOGUE OF MINERALS PRESENTED TO THE CONISTON INSTITUTE (1884)
- 6 CATALOGUE OF MINERALS SHOWN AT EDINBURGH (1884)
- 7 NOTES ON MINOR COLLECTIONS
- VII THE GRAMMAR OF SILICA (not hitherto published)
- APPENDIX: LETTERS, ADDRESSES, AND NOTES
- INDEX
- Plate section
Summary
SECTION I
Nos. 1 to 30, illustrating the nature and relations of FLINT and CHALCEDONY
Pure black flint with exquisitely characteristic “conchoidal” fracture, looking exactly like the cast of a shell.
Black flint less pure (with some admixture of chalk or, perhaps, clay), developing agatescent bands in purifying itself. The bands faulted and terminated in the unaccountable way which, with finer material, forms so-called “Brecciate” Agates. (Compare Nos. 10, 11, 12.) A small fossil (sponge?) is embedded in the angle of this specimen, which is a most finished and comprehensive example of flint-structure. Polished on two sides.
Two pieces, a and b (2070 of my old collection). A superb example of finely delineated and terminated agatescent structure, in dark grey flint.
Rolled pebble of coarse brown flint, with agatescent structure mimicking a fossil. The central division most curiously faulted. Ground down and polished on one side to show structure.
Black flint, full of somebody, I don't know who, gone to pieces. The (weathered or decomposing?) surface showing the forms projecting.
Common grey flint, with very unusual condition of surface. I believe, inorganic, and merely mimicking a fossil; but there may be much disguised organism provoking the forms.
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- Information
- The Works of John Ruskin , pp. 487 - 514Publisher: Cambridge University PressPrint publication year: 2010First published in: 1906