oxegen
Crystals
The rarest naturally occurring element on Earth is astatine. It is a radioactive element with a very short half-life, making it extremely rare and difficult to study. It is estimated that there is only a few grams of astatine present in the Earth's crust at any given time.
Peace on Earth
gold,jewelery and stuff
Of those that are actually found on Earth, plasma is the rarest state of matter. It is present in:excited gases in fluorescent tubes and similarwelding arcslightningauroras
There are many minerals which can be found in the US, the rarest ones include Black Opal, Gold, Bauxite, Tin and Aluminium. There are other minerals which are extremely location specific.
Of the following Elements;O,Si,Al,Fe,Ca,Na,K,Mg....which is the rarest single element in the Earth's crust?.....i say it's Mg because it is on 2% by weight of the Earth's crust.
Apples are cool
There are nearly 2,500 recognized minerals on Earth.
Xenon is the rarest gas element in the earth's atmosphere. It represents 90 parts-per-billion of the total atmosphere.
A total solar eclipse is considered the rarest to see, as it occurs when the moon completely blocks the sun and casts a shadow on Earth. These eclipses are only visible in a specific path along the Earth's surface and can happen every 18 months or so.
Five minerals mined from the Earth are gold, silver, copper, iron ore, and coal.