Bogdasarov, M.A. Mineralogy of fossil resins in Northern Eurasia. Geol. Ore Deposits 49, 630–637 (2007).

https://doi.org/10.1134/S1075701507070215

The investigation is focused on identification and origin of fossil resins from the Cretaceous, Tertiary, and Quaternary sediments
of Northern Eurasia on the basis of detailed study of their physical and chemical characteristics: morphology; size; mass;
density; optical, mechanical, and thermal properties; chemical composition; etc. The composition of amorphous organic minerals
with polymeric structure, fossil resins included, is studied with IR spectrometry, the EPR method, derivatography at low heating
rates, XRD, chemical analysis, emission spectrometry, etc. The results of investigation summarized for the Baltic-Dnieper,
North Siberian, and Far East amber-bearing provinces show some similarity of fossil resins in combination with specific features
inherent to each province. Resins from the Baltic-Dnieper province should be termed as amber (succinite). Their variety is
the most characteristic of Northern and Eastern Europe. Amber-like fossil resins from the North Siberian and Far East provinces
are irrelevant to succinite. They usually occur as brittle resins, namely, retinite and gedanite, without jewelry value. Viscous
fossil resin rumänite with an expected high economic value occurs in the Far East, on the shore of Sakhalin Island.