Quartzite is a non-foliated metamorphic rock that is produced by the metamorphism of sandstone. It is composed primarily of quartz. The specimen above is about two inches (five centimeters) across.
Industrial Hemp Facts. Industrial hemp is a variety of Cannabis sativa and is of the same plant species as marijuana. However, hemp is genetically different and distinguished by its use and chemical makeup. Industrial hemp refers to cannabis varieties that are primarily grown as an agricultural crop.
In the 1980s and 1990s, there was increased interest in the cultivation of industrial hemp as a potential source of new jobs in the agricultural and industrial sectors. As well, there was an increased need to develop alternative sources of fibre.