“Immature amber” - krantzite - in the Middle Urals

The article is devoted to the analysis of the evidence of finding “amber” near the village of Kolchedan in the Middle Urals. This resin is not amber-succinite, but a rare type of fossil resin - krantzite. It is shown that the first written references to resin with properties of krantzite were much earlier than it was singled out as an independent species. A brief characteristic and assessment of its study is given. It is noted that “Kolchedan amber” is a rich and interesting material, which still awaits scientific processing.