Surova V., Horobchyshyn O.

Comparison of decorative and gemological characteristics of snow obsidian from American and Ukrainian deposits

Shevchenko S.

Unique three-dimensional patterns of black opals and their value indicators on the world market

Tatarintsev V.

Problematic issues of English-Ukrainian translation of gemological terms related to diamonds

Tatarintseva K., Ladzhun Yu., Grushchynska О., Gayevsk Yu., Kryzhanovska А.

Terminology harmonization related to biogenic gem materials