they make excellent dimension stone and are a natural fit for landscaping projects. Other sandstones are dense and impermeable, making terrific countertops and backsplashes.
Particles larger than sand are called gravel or pebbles, and specks smaller than sand are officially called silt.

Colors tell us where the stone was formed
For starters, it’s helpful to know what kind of sand we’re talking about. Far and away the most common type of sand is quartz, and hence the most common sandstone is quartz sandstone. Quartz sandstone can be white, light grey, red, yellow, or tan.
If a sandstone is a dark grey or dark brown, it’s probably made of something other than quartz. Bluestone.

Dark brown to dark red sandstones
Patterns in sandstone
Sandstone evokes ancient landscapes
Think of all the places you encounter sand—on a beach, in a river, or across a desert. These are the same types of environments that brought us sandstones.
Sand can be deposited in vast blankets. Sandstone that spans tell us this was a desert during the Cretaceous Period. Massive cross-beds, like those seen on sandstone in, are the remnants of huge sand dunes that marched across the desert floor.
Beach sand tends to be purer than the river sand,
Loose sand can become a super strong stone or one that’s disappointingly crumbly. It’s all a matter of how well those sand grains are stuck together. Groundwater circulates between sand grains, carrying dissolved minerals along for the ride. Over time, minerals fill in the spaces between sand grains and glue everything together. Geologists call this mineral glue cement. The cement can be an iron oxide, silica, clay, or calcite. More importantly, the cement can fill in all the spaces between the sand grains, or only some of them. When a lot of those spaces are left open, you end up with a sandstone. Some, like Rainbow Teakwood,

Evaluating sandstones
Quartzite is a former sandstone
Quartzite is all the rage right now. An unfortunate side effect of this wave of popularity is that some stones are being labeled as quartzite when they aren’t. This is most common with marbles that are labeled quartzite, but some sandstones are being called quartzite, too.
Quartzites start out as sandstone, and then they’re subjected to so much heat and pressure that the sand grains fuse together into one solid mass. Even if you look really close, you won’t see individual sand grains. This makes quartzite less porous than sandstone. That said, this process is not definitive. Some stones straddle the line between sandstone and quartzite. Usually, this is recognizable by the patterns in the stone. If you can see cross-beds, it’s either sandstone or quartzite that has only been subjected to a mild amount of heat and pressure, and Infinity White quartzites are examples of lightly metamorphosed quartzites, while White Sea ‘quartzite’ is actually a sandstone. So, regardless of the label, if a stone has cross-bedding, check the porosity before falling deeply in love with it.
Many iconic buildings are made of sandstone
Sandstone makes wonderful dimension stone, because it’s hard and impervious to the elements, yet it’s still relatively easy to cut, shape, and carve. That said, quartz-based sandstones and quartzites may require some additional fabrication costs due to additional time or tool wear since the minerals are so hard. Sandstone buildings are commonplace all over the world, brownstones to ancient. India is home to many productive sandstone quarries, such as the yellow sandstone in Rajasthan state, the sandstone in Khatu, and the sandstone in India.
takes sandstone construction to a whole new level. They have their own sandstone quarry near campus, with a ready supply of dimension stone. Most of the campus buildings are made of this stone, tying together the campus and lending a native feel to the architecture.
Sandstone is versatile for landscaping
Sandstone has a special place in outdoor spaces. It’s easy to work with and it naturally cleaves into flat slabs for patios, stepping stones, and stone walls. The grainy texture offers grip in wet weather, and it’s manageable to work. Local sandstones are readily available in most places, and each region has its own sandstone. , red sandstone slabs are a proper fit. Sienna Buff, Sienna Grey, and Moss Rock all hail from southern Colorado. In the northeast, bluestone is right at home

By D.C. Bhandari, CEO, Bhandari Marble Group

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