Boron: geological information

Boron is not found free in nature. It occurs usually as orthoboric acid in some volcanic spring waters and as borates in borax and colemanite. Ulexite is interesting as it is a natural fibre optic.

Abundances of boron in various environments

In this table of abundances, values are given in units of ppb (parts per billion; 1 billion = 109), both in terms of weight and in terms of numbers of atoms. Values for abundances are difficult to determine with certainty, so all values should be treated with some caution, especially so for the less common elements. Local concentrations of any element can vary from those given here an orders of magnitude or so and values in various literature sources for less common elements do seem to vary considerably.

Abundances for boron in a number of different environments. Use the links in the location column for definitions, literature sources, and visual representations in many different styles (one of which is shown below)
Location ppb by weight ppb by atoms
Universe 1 0.1
Sun 2 0.2
Meteorite (carbonaceous) 1600 3000
Crustal rocks 8700 17000
Sea water 4440 2500
Stream 10 1
Human 700 410

Log abundance (by atom numbers) in our sun

The chart above shows the log of the abundance (on a parts per billion scale) of the elements by atom number in our sun. Notice the "sawtooth" effect where elements with even atomic numbers tend to be more strongly represented than those with odd atomic numbers. This shows up best using the "Bar chart" option on the chart.

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boron atomic number