- Your research paper is written by certified writers
- Your requirements and targets are always met
- You are able to control the progress of your writing assignment
- You get a chance to become an excellent student!
Essay Details:
Essay text:
However, sheltered areas on limestone and marble buildings and monuments show blackened crusts that have peeled off in some places, revealing crumbling stone beneath. This black crust is primarily composed of gypsum, a mineral that forms from the reaction between calcite, water, and sulfuric acid. Gypsum is soluble in water; although it can form anywhere on carbonate stone surfaces that are exposed to sulfur dioxide gas (SO2), it is usually washed away. It remains only on protected surfaces that are not directly washed by the rain. Gypsum is white, but the crystals form networks that trap particles of dirt and pollutants, so the crust looks black...
Showed 18% of text Buy database access to get full access to all 184 988 essays
Calculate a fair price for your order
Do you need an essay?
A professional team of writers is able to craft custom essays from scratch according to your instructions. We are ready to satisfy writing needs of every demanding customer.
Do you need many essays?
The product provided is intended to be used for research or study purposes. Get instant access to over 200,000 papers.
Common topics in this essay:
Feedback of people who used our services.