The archive supplies names for several hard-stone examples and historical mining-method categories. This taxonomy keeps those names visible while withholding every operational detail. It is neither a work sequence nor a recommendation for a quarry, machine, or stone.
Examples placed in the archived hard-stone group
Granite, granodiorite, quartz diorite, diabase, gabbro, peridotite, basalt, and gneiss are the examples listed by the source. The list records the archive's grouping; it does not certify a specimen, establish a current geological standard, or show that every stone bearing one of these names behaves alike.
Qualitative contrast retained with caution
The source contrasts hard and soft stone in terms of mineral composition and physical or mechanical properties. It also names splitting behavior as one planning factor associated with many hard stones. These are qualitative observations, not universal rules. A project would need current geological characterization and site engineering before any material or method decision.
Historical category map
The following labels are presented only so a reader can understand how the archived article was organized. No category includes setup, dimensions, tools, drilling pattern, charge, temperature, sequence, initiation, splitting action, speed, feed, or other executable detail.
Flame-cutting category
A historical method name in the source. This page provides no procedure, suitability statement, site condition, or outcome claim.
Row-hole drilling with splitting category
A non-operational civil label only. The archive is not reproduced as an instruction, and no drilling or splitting detail is supplied.
Wire-saw combination category
The source names combinations involving wire sawing. No machine identity, wire specification, arrangement, operating control, or comparative result is bound.
Circular-saw combination category
The source names combinations involving circular sawing. No blade, machine, track, cut plan, or current application is established here.
