I’ve also heard that diamonds get cumulative damage with time, that after
about 20 minutes worth of heating at soldering temperatures they start to
’burn’. You can also ‘burn’ them at too high a temperature. Can anyone
As long as you keep oxygen away from diamonds they won’t burn. I heated
diamonds to a glowing red heat with no damage (with a heavy boric acid
covering). Burning a diamond first turns the surface chalky white, then
the body of the diamond starts turning blue after prolonged heating at
A friend of mine works at the SLAC (Stanford Linear Accelerator Center).
They use thin slices of chemically pure diamond to align the electron
beam. After a few days use the diamonds become unusable because of
damage to the cubic matrix. They also turn blue at that point.
A possibly interesting point, he explained to me that the distance
between the carbon atoms in a perfect cubic matrix (atoms at the corners
of a cube, each cube adjoining the next…) is the same as the
wavelength of blue light. Therefore, chemically pure diamonds (better
than true D-flawless) exhibit a blue-white color, thus the old and
obsolete term of “blue-white”. The public never sees diamonds of this
purity, they are used in science research however.
Handmade 18K, 22K, and platinum gemstone fine jewelry.
Diamond setting, rubber/metal molds, casting, lapidary
Die and mold engraving, plastic patterns for casting.
Cad jewelry design, cad/cam milling scroll filigree…
P O Box 2057 Fairfield IA 52556 515-469-6250