About us

What you will find

A mineral encyclopedia, gem varieties and rocks, a collection of specimens, the geological regions of Tajikistan, a research library and articles.

And tools to learn by doing: compare minerals side by side, identify a stone by its properties, and the Crystal lab, where 3D crystal models show what a photo cannot.

Our standard

Every scientific and regional claim states how well it is supported. Localities are named only with a source; where something is uncertain, we say so.

Crystal models are computed from measured crystal structures, not drawn by hand.

Three languages

The same content in Tajik, Russian and English, so that readers in Tajikistan and beyond can learn in the language they read best.

Who writes

Texts are prepared and checked by the editorial team before they are published. Readers with an account can apply to write for Sang; articles are reviewed before they appear.