Antique ring with emerald and brillyantami

[Металлист]

Сообщение от sergejnowo

the question is that the jeweler had in mind

The jeweler can do nothing to keep in mind, it gives a definition.
  Technical diamonds do not exist. Even in view of the jeweler.
  Technical diamond - a diamond with defects (color, natsvet, feathers, blotches, crack, etc). Simply ask visible and do not allow to use it in jewelry. That is, commercial diamond becomes a diamond.
 Exceptions - African black korichnivye etc. diamonds, close to the technical, but disguised as "rare color diamonds,"
are often granite in diamonds.

Added after 4 minutes
We strayed from the topic, would not let a sale of a new bestseller!

Сообщение от neborator

but there is an opinion and as to who was hiding under the monogram MM If interested, read in my book, I am now finishing kotorayu.

MM - Really, Antokolsky Morduch Matysovich!