Rocks are used all around us in many different ways. In the classroom, students use rocks everyday. Graphite, a metamorphic rock, is the part of the pencil used for writing.Slate, another metamorphic rock, was used to make blackboards in years past.Now most blackboards are constructed of man-made materials. Chalk is a soft form of limestone which is a sedimentary rock.ocks are used all around us in many different ways. In the classroom, students use rocks everyday. Graphite, a metamorphic rock, is the part of the pencil used for writing.
1 The pavers that they sell are priced anywhere from $3 to $6 per square foot. 2  According to the website PaverSearch.com, the price of pavers can range anywhere from $0.50 to as much as $15 per square foot. 3  The cost is going to greatly depend on the type of paver. Concrete pavers will cost anywhere from $5 to $12 per square feet. 2  Something such as natural stones are going to have to be customized most of the time, meaning a higher price tag. 3  Poured concrete pavers give the illusion of pavers and can cost anywhere from $3 to $7 per square meter.
The pavers are sold by numerous manufacturers at various quality levels. An average paver costs from $1.23 to $1.50/sf. The substrate for a 1,000-square-foot driveway would cost more than $500, and the concrete would cost around $75.Joint sand would cost under $50. The second category is cost of installation.his will include sub-categories, such as labor, profit margins, if they are installed by professionals and miscellaneous fees including delivery and disposal. In addition, some cities require homeowners to purchase a building permit for this work. Installation costs range from $765 to $2,400.