Noah Brooks,
The Overland Monthly
(1868)
“ The idea that carbon is capable of being solidified into its purest form, the diamond, was always uppermost in his mind; and pondering on the fact that here was crystalized carbon—only simple carbon in its purest form—he continually asked himself, "Why cannot this familiar element be caught, prisoned, and solidified into the precious gem?" "Nature," he argued, "has but few secrets in her laboratory which are not penetrable to man; her processes are hidden, but may be discovered or imitated; and if we know that Nature makes a diamond by crystalizing carbon, why not follow in her footsteps?" ”
