Functiona!

The crystal is growing - slowly, but with good quality. Well, the upper part of the crystal is pure chaos, but the bottom port point towards the source is very acceptable. Thus the next growth will certainly result in a beautiful crystal. For that I need a nylon string which I was not able to organize up to now. Same for the almonds - I could not find 200g almond packages, yet.

To sum it up: The heat is on!

No functiona :-(

Up to now it does not work :-( Maybe I have to try a stronger bulb? If until tomorrow no crystals grow I will change the setup. In the future I also want to try a reversed temperature gradient, that means at the top of the  container is the hot side and at the bottom the cold side. This will require some changes of the interior of the container for depositing the source material in some way.