Knowledge
Our knowledge section provides important background information on gemstones in general, investments and gemmology.

How to sell gemstones
If you are interested in investment gemstones, you will sooner or later deal with the question of how to sell your stones again. [...]
The Top 10 Investment Gemstones
Which gemstones are particularly worthwhile as an investment? What is the minimum size of gemstones that can be considered for investment? [...]
The Garnet Group
Garnet" denotes a group of minerals. We provide an overview of the most important colors and discuss which ones are interesting for an investment [...]
Storing investment gems properly
Anyone who invests in gemstones must also think about storage. The costs of storage as well as the safety of the valuable stones must be consider [...]
Sapphire varieties – more than just blue
The best-known varieties are pink, orange, yellow and white sapphires, but there are also bi-color, color-change and star sapphires. [...]
Pigeon Blood, Royal Blue & Padparadscha – Special Color Shades in Gemstones
Gemstones come not only in different colors, but also in a variety of shades. Some are more sought after and thereful more valuable than others d [...]
Gemstone or precious stone?
What is the difference between gemstone and precious stone? Which stones are suitable for jewelry? Which ones for an investment? [...]
Rough gemstones & untreated, natural gems
Rough stones, untreated gemstones, natural gemstones - are they one and the same? [...]