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.
Like marijuana, hemp contains the psychoactive ingredient THC, but in such small amounts itâs almost not measurable in hemp. Early this month, a farmer in Colorado harvested the first legally produced industrial hemp crop in 56 years.