(or decorative gravel
as it’s more commonly called) consist of small pieces of rock that are usually between 10mm and 20mm in size. The shape and edges of these pieces vary and may be sharp, smooth, rounded of square.
The main uses for decorative aggregates (as opposed to construction aggregates) are in landscaping and gardening applications like driveways, paths, borders and edges. Good coloured gravel can be used to great effect and can produce stunning colour and brightness to otherwise dull areas. Decorative gravel can be put into 2 distinct categories.
Naturally Formed Gravel
Natural grave usually consists of smooth rounded shapes, naturally formed from sources such as rivers and estuaries over immeasurable lengths of time. It is very popular in landscaping and useful to use in areas where it may come in contact with hands and feet. By far the most popular natural gravel is pea gravel, which when mixed with quartzite gives a nice blend of beige, greys and creams. For people who prefer a larger stone, highland pebbles (which are formed on the River Tweed) are great for borders and edges, but are a little too large for walking or driving on.
Man Made Gravel
These are stones that are usually mechanically crushed before being filtered to the correct size. Man-made decorative aggregates typically have sharp edges and are quite uniform in size due to the filtering process after crushing. The most popular types of man-made gravels are golden gravel and red granite gravel which are made from flint and granite respectively. These types of gravels are used in all landscaping and gardening applications but they especially popular for driveways and paths. Crushed slate, which is a by-product of the slate mining industry is now becoming more popular in the UK and it is produced in a similar production manner to granite and flint based aggregates.