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.
Many state definitions for industrial hemp specify that THC concentration is on a dry weight basis and can be measured from any part of the plant. Some states also require the plant to be possessed by a licensed grower for it to be considered under the definition of industrial hemp.