Granite, marble, sandstone, and slate are the four classification headings preserved from the historical article. The source offers no identified specimen, quarry, standard, laboratory method, project, or test record, so the headings cannot support universal property or application conclusions.
The archived taxonomy at a glance
- Granite
- Retained as a class name only.
- Marble
- Retained as a class name only.
- Sandstone
- Retained as a class name only.
- Slate
- Retained as a class name only.
A class name is not a tested specimen
A defensible classification record would identify the specimen, its source, the responsible identifier, the cited standard or taxonomy, and the scope of the conclusion. A property statement would additionally require an attributable method and result for that same specimen.
The locked archive supplies none of those links. Broad statements about formation, appearance, hardness, absorption, weathering, chemical response, or service use therefore remain outside this page.
The second image remains unclassified
Visual appearance alone is not a substitute for specimen provenance or a declared classification basis.
The final image carries the same limitation
No caption source in the audit identifies what the image represents or whether it belongs to the same material as either earlier file.
