Guide
Tourmaline guide: lagoon, rubellite and more at...
Hardly any gemstone shows such a range of colour as tourmaline. We explain the most important varieties — from lagoon to rubellite.
Tourmaline guide: lagoon, rubellite and more at...
Hardly any gemstone shows such a range of colour as tourmaline. We explain the most important varieties — from lagoon to rubellite.
Tanzanite: why this rare gemstone occurs in onl...
Tanzanite is one of the rarest gemstones of all — and is found exclusively in a single area at the foot of Kilimanjaro.
Tanzanite: why this rare gemstone occurs in onl...
Tanzanite is one of the rarest gemstones of all — and is found exclusively in a single area at the foot of Kilimanjaro.
How to recognise a genuine, untreated sapphire
Not every blue stone is a genuine sapphire — and not every sapphire is untreated. We explain what to look for when buying.
How to recognise a genuine, untreated sapphire
Not every blue stone is a genuine sapphire — and not every sapphire is untreated. We explain what to look for when buying.
Gemstones as an investment — what to look out for
Coloured gemstones are considered a crisis-proof, portable investment — but not every stone is suited to it. We show what really matters.
Gemstones as an investment — what to look out for
Coloured gemstones are considered a crisis-proof, portable investment — but not every stone is suited to it. We show what really matters.