Gem diamonds can now be created in the laboratory from graphite, the soft black substance used in "lead" pencils. There's just one snag about the new gems they're still far more costly to produce than those dug
from the ground. The diamonds seen here have been polished, but have the shape in which they were "grown" in a special apparatus that subjects graphite (the pile of dark powder) to extreme pressures and temperatures.
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Taupo Times, Volume 19, Issue 97, 15 December 1970, Page 5
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73Gem diamonds can now be created in the laboratory from graphite, the soft black substance used in "lead" pencils. There's just one snag about the new gems they're still far more costly to produce than those dug from the ground. The diamonds seen here have been polished, but have the shape in which they were "grown" in a special apparatus that subjects graphite (the pile of dark powder) to extreme pressures and temperatures. Taupo Times, Volume 19, Issue 97, 15 December 1970, Page 5
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