According to the International Mineralogy Association, there are over 4,124 valid species of minerals.
There are over 3,500 named minerals, for which there are many additional 'also-known-as' names or nicknames.
Nearly four thousand minerals have been named, but only less than twenty are common.
Their has been 4,000 different types of minerals discovered.
3600 mineral have been identified
4,000
The two rocks in question may have different percentages of the same minerals, or their method of formation could be different, which can affect the shape and size of the mineral grains. Trace minerals in the two rocks could also alter their appearance, as well as the amount of weathering the rocks have been exposed to.
Fossils, although technically they are not preserved in the earths crust; the minerals in the bones and pore spaces have been replaced by other harder minerals which take much longer to weather.There are a number of different fossilization processes. See this link :How are Fossils Formed?
The answer is Foliation.
A mineral is a substance that results from geologic processes, and is further defined as having a specific chemical composition and physical structure. It's not just a "mix" of stuff. A native mineral is a mineral that is found in a specified locality. If we consider quartz, the most abundant mineral on earth, it could be said to be native to just about anywhere. Hematite, the primary ore of iron, is found on earth (is native to earth), but is also native to Mars as well. The mineral has been found there at the Opportunity landing site. Minerals are "rocks" of a fairly specific nature, and native minerals are minerals from an area that has been defined.
This is false. A lode is not a layer of minerals that has been deposited in a stream. A lode is formed by hot mineral solutions going into the cracks of the rocks.
more than 20
4,000
So far, over 3000 minerals have been found, and every year new ones are discovered.
Mineral grains are crystals or pieces of crystals that vary widely in chemical composition. There are over 4,000 different minerals that have been identified so far.
I don't know about all governments but the US government claims to have no knowledge of UFOs or alien beings. But UFOlogists (people that study UFOs) have classified 4 distinctly different types of aliens.
Three types of Gaucher disease have been identified, but there are many variations in how symptoms develop.
because they have always been there
There are about 70 different sleep disorders.
Three types of botulism have been identified: foodborne, wound, and infant botulism. The main difference between types hinges on the route of exposure to the toxin.
There are a lot of types of plants. The Plant Kingdom has an estimated 350,000 different members, of which less than 300,000 have been identified. Use the link below for more information on the structure of the kingdom Plantae.
There are different types of species and genus's of dragons and drakes that are known and have been "identified" in fables and fantasy stories and games. Among them are the following. Knuker dragon, Frost dragon, Lindworm dragon, Wyvern dragon.
There are many different types of cancers, and they can affect any organ in the body. The most common cancers that affect men are prostate cancer, lung cancer, and colon cancer. The most common three that affect women are breast cancer, colon cancer, and lung cancer. There are many other types than those though.