granite
Let an agent identify granite and its varieties, explain its formation and properties, relay stone standards, quarrying and radon information from geological and industry sources, and separate true granite from other stones sold under the name.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent identify granite and its varieties, explain its formation and properties, relay stone standards, quarrying and radon information from geological and industry sources, and separate true granite from other stones sold under the name.
A coarse-grained intrusive igneous rock composed mainly of quartz, feldspar and mica, formed by slow cooling of magma deep in the crust; one of the most common rocks of the continents, quarried worldwide as dimension stone for buildings, monuments, kitchen worktops and paving, and named in the trade by quarry and colour.
What it is for: Building and decorative stone; a common continental rock.
It can be identify granite by minerals and texture; explain formation and properties; relay stone standards and testing; distinguish geological granite from trade granite.
Distinguishing features
Coarse-grained plutonic rock
Quartz and feldspar dominant
Formed by slow cooling at depth
Trade name used loosely for hard stones
What it looks like
A speckled coarse-grained rock in grey, pink, white or red, with visible crystals of quartz, feldspar and mica.
Physical character
density: about 2.6-2.8 g per cubic centimetre
compressive strength: about 100-250 MPa
quartz content: about 20-60 percent - by definition
How it is recognised
Visible interlocking crystals
Quartz, feldspar and mica together
Gneiss is banded; basalt is fine-grained; many trade granites are other rocks
Related models
is a kind of - intrusive igneous rock
is a kind of - the wider family
is made of - the main minerals
is used as - the main use
In practice
Families and kinds
geological granite varieties by composition and texture
named commercial granites by quarry such as Baveno and Bianco Sardo
granitoids including granodiorite and tonalite
weathered and decorative forms
granite landforms such as tors and inselbergs
Standards and regulation
EN 12670 and related standards for natural stone terminology and testing
ASTM C615 for granite dimension stone
Quarrying and worker safety rules including silica dust limits
Failure modes and hazards
Silica dust exposure in quarrying and fabrication
Low-level radon emission from some granites
Cracking and staining in worktops
Misnaming other rocks as granite
Also called
+41
Where this came from
wikidata · CC0 1.0
Also registered as vr.tr.granite
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Identify What granite this is.
Identity.
Minerals
Composition and texture.
Minerals
Minerals.
- What minerals and texture define granite, and how is it classified? definition
- Is the rock a geological granite or a trade granite? boundary
Variety
Varieties.
Variety
Variety.
- Which variety or commercial name applies, and from which quarry? provenance
- Which entry fits the specific stone? action
Geology Formation and occurrence.
Geology.
Formation
Formation.
Formation
Formation.
- How does granite form, and what do its features tell about the magma? definition
- Which entry fits igneous petrology? action
Landforms
Landforms and weathering.
Landforms
Landforms.
- What landforms does granite produce, and how does it weather? provenance
- Which references are standard? provenance
Use Stone industry.
Industry.
Quarrying
Quarrying and fabrication.
Quarrying
Quarrying.
- How is granite quarried, cut and finished, and what safety rules apply? provenance
- Which entry fits the stone industry? action
Specification
Standards and testing.
Specification
Specification.
- Which standards and tests specify granite for construction? measurement
- Which entry fits dimension stone? action
Context Health and heritage.
Context.
Health
Radon and dust.
Health
Health.
- What do authorities say about radon from granite and about silica dust? provenance
- Is the user asking about a specific building, which needs a measurement service? boundary
Heritage
Monuments.
Heritage
Heritage.
- How has granite been used in monuments and architecture through history? provenance
- Which entry fits architectural stone? action
What the second pass must settle
- Should commercial granite names be separate entries?
- How should stone standards be linked?
- The registry entry has merged aliases naming quarry stones; should they be split off?