Production of real Precious Stones. Results obtained. Becquerel.
Ebelman. Gaudin. Henri Sainte- Claire Deville. De Senarmont. Daubrie.
Durocher. Sainte-Claire Deville and Caron, &fc.
" Beset with emeralds And diamonds with sparkling nibies red In checlcerwise, by strange invention."
have seen that the elementary constituents of precious stones must have
existed once in a condition that allowed them to move freely; and that
this condition was obtained by one of three general methods—
1st.—Direct fusion of the substance by a sufficient heat.
at variable temperatures of the mineral substance in a foreign body,
and complete or partial volatilization of the dissolvent; or
crystallization without evaporation under the influence of natural
forces, either alone or aided by heat, electricity, &c.
3d.—Prior reduction into vapour of substances destined to react upon each other.