Bismuth(metal)rainbow (synthesized. crystal) in a box. Germany

The cost is prescribed for the smallest sample.

Rainbow bismuth crystals are presented in assortment, in plastic boxes.
Box size: 28/28/22 mm

Green, blue, yellow, purple, violet shades of bismuth prevail.
The cost of samples is from 270 to 450 rubles per unit.
Artificially grown bismuth in the laboratory - by heating to a certain temperature and then by cooling, and the purer the bismuth (without impurities), the iridescent (colored )the oxide film is obtained.

Suitable for various crafts, creative inspirations, perhaps jewelry, but very weighty..and also, in most cases, of course, for the collection.
If you want to make a video or additional photos in WhatsApp or Viber.

Bismuth is a rare metal, and its world production/consumption barely exceeds 6000 tons per year (from 5800 to 6400 tons per year).
Interestingly in the solid state bismuth is less dense than liquid. This property is possessed only a handful of substances among elementary, in addition to bismuth, germanium, gallium, and some compounds, e.g., water.

Bismuth is the strongest diamagnetic, and the effect of diamagnetism can be observed in simple laboratory conditions, unlike other available, but very weak diamagnetic.

Suspended on a thin thread, the sample of bismuth noticeable to the eye is repelled from the pole of any magnet. Having large enough blocks of bismuth and a powerful magnet, even at home, you can see that the repulsion force is sufficient to detach the magnet from the support. This phenomenon is called diamagnetic levitation.

Bismuth is relatively safe for the environment.
Bismuth oxide chloride is used as a Brightener in the production of nail Polish, lipstick, shadows ..