On average,how long does it take for a large diamond to form deep underground???

Question

...tom science

Answer 1

This turns out to be a difficult question to answer. The main reason is that diamonds do not themselves contain anything useful for radioactive dating. They are almost pure carbon, and are much too old for radiocarbon dating. An internet search I did revealed some new work, published in 1998, that suggests that at least one diamond from Siberia may have grown over a
period of more than 300 million years. This work was done by dating inclusions of sulfide minerals (little crystals trapped inside a bigger crystal) within the diamond using Renium and Osmium.

Diamonds grow more than 150 kilometers deep in the mantle and their growth rate may be highly variable depending on the local abundance of carbon (which is very scarce in the mantle in general), the temperature, the presence or absence of melt, and other factors.

The time it takes to make a diamond should not be confused with the diamond's age. A diamond could form and then just sit around for a long time. Many of the diamonds we find at the surface of the earth or in mines are very old, perhaps 3 billion years (the Siberian diamond inclusions mentioned above are apparently 3.4 to 3.1 billion years old).

http://earth.leeds.ac.uk/ygs/programme/year1998/mar98.htm#Pearson)
http://www.madsci.org/posts/archives/jan2001/980269533.Es.r.html

Answer 2

Diamonds at the instant are not shaped interior the Earth's crust as maximum different gem stones are. they're shaped via great warmth and severe stress, plenty deeper down interior the layer of volcanic magma suggested as the mantle. Temperatures here attain one thousand stages centigrade and the stress may be as severe as 50 kilobars - 50 cases greater stress than you would be placed under if it become plausible to dive to the non-public think approximately an ocean. The earth's mantle is huge so there is the prospect that interior this is billions of forming diamonds gazing for a time whilst they're exploded directly to the earths floor. this is only a random adventure that sends those ideal gemstones to the exterior. they're expelled via “Kimerlite Pipes” whilst an underground explosion pushes magma at extensive % via one in each of those pipes taking with it a number of of diamonds. those surprising stones are modern-day in rivers, plains or seas. As such they're alluvial, as are sapphires and rubies and due to the character of their expulsion from the mantle inflicting them to be modern-day in river beds it extremely is totally puzzling to declare precisely the place a particular diamond originates from. often they have travelled for thousands of miles from their commencing place.

Answer 3

All diamonds regardless of size are billions of years old.

Answer 4

l believe it takes millions of years, but l have heard of a scientific way to develope them in a matter of weeks.

Answer 5

5 minutes I think.

Answer 6

approx 2500 yrs.