This note separates the material categories present in the archived record from claims that would require a named granite grade, a test method, or current project evidence. It is a reading aid for the source record, not a quarry plan or a machine-performance statement.
What the archive says about granite
Hardness and mining context
The archive characterizes granite as hard and wear resistant. It also compares granite qualitatively with sand, limestone, and marble and says granite is more difficult to mine. Those statements explain why material identity matters, but they do not establish a universal mining method, tooling choice, production rate, or equipment setting.
Decorative appearance
Decorative appearance is another category in the record. Public-place and outdoor decorative uses are mentioned as examples. No named project, finish specification, acceptance standard, or exposure test is attached, so the examples should be read as archived context rather than proof of suitability for a particular installation.
Physical behavior
The source groups several physical properties together, but the record does not bind them to a material grade, laboratory method, specimen, or comparator. This candidate therefore retains the category only. It does not repeat broad assertions about yield, processing quality, impact behavior, conductivity, magnetism, or measured damping.
Chemical stability
Chemical stability appears as a source topic. The archive does not provide composition data, an exposure environment, a weathering test, or a traceable service record. No service-life figure or granite-wide durability promise is carried into this note.
How to use these categories
The four categories can organize a later evidence request without predetermining its answer. A material-specific review would need to identify the actual stone and the decision being made. Hardness or wear resistance would need a defined test basis; decorative use would need finish and exposure requirements; physical behavior would need named properties and measurement methods; chemical stability would need composition and environment. None of those project-specific records is frozen here.
This distinction also keeps the page separate from equipment selection. The archive can support a concise map of granite-related topics, but it cannot select a quarry machine, define a cutting sequence, predict block recovery, or compare operating economics.
