How Rare are Diamonds?How Rare are Diamonds?
“How many grams do you need to mine to get 5 grams of diamonds?
(5g/1000 kg) @ 1000 g/kg = 5 g /1,000,000 g!
But only 20 % are gem quality (80 % of these are sold in a "managed selling environment") and the remainder are used for industrial purposes (this material is known as "bort" or "carbonado" (carbonado is finer)).
Source: https://ist-socrates.berkeley.edu/~eps2/wisc/Lect6.html
► The portion of the NR cited below indicates that these are GEM quality!
“It is also noteworthy that at this early stage, a very high proportion of the diamonds recovered are classified as intact, well preserved, white, transparent octahedrons, dodecahedrons or fragments with defined crystal faces.”
See for yourself! Here is a link to a web site that markets rough, uncut Gem White Transparent
Octahedrons:
https://www.diamondcrystals.net/lot.htm