The top 10 investment gemstones
What gemstones are good investments? What is the minimum size of gemstones that can be considered for investment?
The journal
Gemstone knowledge
Background on coloured gemstones, certification, valuation, and what makes a stone investment grade — from our gemologists in Colombo.
Price guide
Ceylon Blue Sapphire Price Guide: What You'll Pay Per Carat
From a few hundred dollars to five figures per carat — what actually moves the price of a Ceylon blue sapphire, and what to expect at every budget.
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Buying guide
Heated vs Unheated Sapphires: What Every Buyer Should Know
Nine in ten sapphires on the market have been heated. Here's what that means, why unheated stones carry a premium — and which treatments to refuse outright.
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Colour guide
Cornflower vs Royal Blue: Ceylon Sapphire Colours Explained
Velvety cornflower or deep royal blue? What the famous colour names actually mean, how labs grade them, and which blue holds value best.
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Jewellery
Ceylon Sapphire Engagement Rings: The Diana Effect
One 12-carat Ceylon sapphire changed engagement rings forever. Why sapphire works for a lifetime of wear — and how to choose yours.
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Buying guide
How to Tell If a Gemstone Is Real: 7 Checks Every Buyer Should Know
Glass, synthetics, doublets, diffusion — the fakes are better than ever. Seven practical checks that separate real natural gemstones from impostors.
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Certification
Gemstone Certification Explained: How to Read a Gem Lab Report
A certificate is not paperwork — it's protection. What gem reports prove, which labs matter, and the two lines that decide a stone's value.
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Precious vs Semi-Precious Gemstones: Does the Label Still Matter?
Diamond, ruby, sapphire, emerald — and everything else? Why the old precious vs semi-precious divide misleads buyers, and what actually drives value.
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The most important gemstone mines in the world
The rubies from the Mogok Valley are famous for their unique color: a pure red with a slight blue tinge — the so-called pigeon blood rubies.
Spinel: more than just carbuncle stone
For a long time, the gemstone spinel led a niche existence and was mistaken for ruby. It deserves far more recognition.
Gemstones as a legacy
Apart from their aesthetic value, the particular advantage of gemstones lies in their high concentration of value in the smallest of spaces.
Gemstones for engagement, wedding and anniversary rings
Rings have always been a symbol of love and eternity. Coloured gemstones make them truly personal.
Performance of gemstones: a brilliant investment
Compared to other forms of investment, the appeal of gemstones lies in their stable performance and low volatility.
Gemstones on trend: which jewels are currently in demand?
We reveal which gemstones are particularly popular at the moment — and why classic stones and cuts are always on trend.
From Paraíba to Mozambique: gemstones from legendary deposits
The region around Muzo, Coscuez and Chivor is part of the emerald belt in Colombia, where geological conditions are ideal.
Gemstone steps: minerals as natural works of art
Steps form on the walls of cavities in rock and are often part of druses — nature's own sculpture.
Prefer to talk it through?
Our gemologists are happy to answer questions about certification, origins, and building a collection — no obligation.