Olena Rybnikova

Olena Rybnikova is a Gemologist and PhD candidate (Mineralogy) holding a Masters degree in Gemology from Taras Shevchenko National University of Kyiv. Her work focuses on the formation and alteration mechanisms of gem-quality minerals and synthetic materials.

Geology

Olena Rybnikova December 4, 2020

Geology Fundamentals: Metamorphic Rocks

There are three types of rocks: igneous, metamorphic, and sedimentary. This article is the second in our series on the…
Read More »
Deposits and Projects

Olena Rybnikova November 6, 2020

Tanzanite: A Rare Blue Beauty

Tanzanite is one of the most desirable gemstones today. Even though tanzanite is a newly-discovered mineral, it rivals the big four…
Read More »
Commodities

Olena Rybnikova September 24, 2020

Gemstone Commodity Overview

Gemstones have enchanted humans since ancient times. Gems were believed to be gifts of gods, miracles of nature or stars…
Read More »
Important Mining Districts

Olena Rybnikova August 14, 2020

Emerald Heart of Africa: The Kagem Mine, Kafubu Mining Area, Zambia

The Kafubu Mining Area is one of the largest suppliers of gem-quality emeralds in the world, second to Colombia. Located…
Read More »
Deposit Types

Olena Rybnikova February 7, 2020

Pegmatites – Our Greatest Source of Gemstones

Pegmatites are the major source of gem-quality minerals throughout the world. They typically host perfectly clear topazes, tourmalines, beryls and…
Read More »