Types of sandstone
Sandstone can be broadly categorized into three groups:
- Arkosic sandstone: If the sandstone have a significant
amount of feldspar grains, it is called arkosic sandstone. It has a
high percentage of quartz, but also contain identifiable feldspar
grains.
- Quartzose sandstone: These sandstones have a high quartz
content.
- Argillaceous sandstone It has a significant clay or slit
content.
Varieties of sandstones
Depending on the constituent materials, colors, and places of origin
sandstone can be of various types.
- Chocolate Sandstones- It comes under Proterozoic
arenaceous sedimentary rocks. Chocolate sandstones are mainly found
in Northwest highland of Scotland. These sandstones are rich in iron
oxide. Mainly used in exterior wall cladding.
- Marson copper- Also known as Bhilwara-Brown. It is made
of grains of quartz and other fairly uniform size minerals.
- Dholpur beige- This white colored sandstone is being used
in a no. of historical buildings and monuments.
- Agra red- It is very smooth and soft which makes it idle
for stone handicrafts. It is also called Dholpur red.
- Dholpur pink- It has uniform grain size and durability,
mostly used for exterior cladding of walls and boundaries.
- Lalitpur yellow- Due to its thermal and acid resistant
properties, it is mainly used for exterior cladding in sea shore
buildings. It is also called LLP-yellow.
