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A basic understanding of stone formation is
useful when required to repair or maintain them.
Types of stones:
1. Igneous
Andesite, Basalt, Diorite, Feldspar, Gabbro,
Granite, Granodiorite, Nepheline Syenite
Obsidian, Peridotite, Pumice, Rhyolite,
Trachyte and Tuff.
2. Sedimentary
Breccia, Chalk, Chert, Coal, Conglomerate,
Dolomite, Flint, Graywacke, Limestone,
Mudstone, Rock Salt, Sandstone, Shale and
Travertine.
3. Metamorphic
Anthracite, Eclogite, Granulite, Hornfels,
Marble, Migmatite, Quartzite, Serpentine
and Slate.
Geologists further their classifications as:
intrusive, extrusive, acidic, basic, ultra-basic,
intermediate etc.
In our trade, we will mainly deal with:
Basalt,
Gabbro,
Granite,
Limestone,
Marble,
Sandstone and Slate.