Knowledge
Our knowledge section provides important background information on gemstones in general, investments and gemmology.
The ruby – Stone of stones
The ruby has been one of the most highly regarded gemstones since time immemorial. Its name comes from "rubens", which means "red". [...]
COLOUR-CHANGING STONES
Alongside truly multicoloured variations, some gemstones possess definite effects that suggest a colour change or at least a change in nuances of [...]
ON THE HARDNESS OF GEMSTONES
When is a mineral a precious stone? When it is rare? When it is especially beautiful? In reality, most definitions of a gemstone include the mine [...]
WHAT MAKES GEMSTONES VALUABLE?
The value of a particular gemstone is only partially related to its rarity. The price that it can command is far more a product of the demand for [...]
ON THE SIZE & WEIGHT OF GEMSTONES
The weight of a gemstone is measured in carats (ct). 1 carat equates to 0.2 grammes, or in other words, 1g = 5ct. This means that certified gems [...]
Gemstone Certificates & Grading Reports
How to be certain that a gemstones is genuine? Certificates from recognized gemological labs specify the unique characteristics and qualities of [...]
Gemstones as an Investment
What is valuable? Something that is rare, something that is beautiful, and something that is coveted. All three terms apply to gemstones. But doe [...]
