On passion, purpose, and what twenty years of sourcing gems taught me about finding your lane — and staying in it.

There is a moment every gem professional learns to wait for. You’re in at the ruby mine in Mogok, or under fluorescent lights at a trade show in Bangkok, and someone slides a parcel across the table. You pick up a stone — unassuming, in a ziplock, still carrying the grit of the earth — and you hold it to the light.

In that moment, you’re not looking at what the stone is. You’re looking for what it could become. You’re reading its fire.

After more than two decades of doing this — sourcing rubies from Burma, sapphires from Sri Lanka and Kashmir, emeralds from Colombia, tourmalines from the hills of Mozambique — I’ve come to believe that this is not merely a professional skill. It’s a way of seeing. And it applies far beyond gemstones.

People work the same way. So do careers, institutions, and ideas. The question is never simply “what are you?” The question is: have you found the cut that lets your fire out?

Three things a gem needs, yes, Three things you need.

In gemmology, we talk about the really essential qualities of a fine stone: what it is made of, where it comes from, and what can be done with it. A ruby is corundum by composition — but it is Burma that gives it its high dose of vanadium and little iron, and it is the cutter’s hand that determines whether the rough becomes brilliance or waste.

I’ve been thinking about a parallel framework for people — one that a mentor of mine put simply but precisely. He said the first question worth asking yourself is not “what should I do?” but rather: where have I been given mission, agency, and capability?

Three words. Each one doing specific work.

Where all three overlap, that is your lane. Mission without capability is wishful thinking. Capability without mission is talent spinning without traction. Agency without the other two is just restless ambition. But when they converge — something focused, something rare becomes possible.

The cut that releases the fire

In gem cutting, there is a concept called the critical angle — the precise geometry at which light entering a stone will reflect internally rather than leak out through the base. Get the cut right, and the stone blazes. Get it wrong, and even a fine ruby looks dull and lifeless from across a table.

Passion, I’ve found, works the same way. Raw passion — uncut, undirected — generates heat but not necessarily light. What gives it brilliance is the angle at which it meets the world. That angle is purpose.

For those of us who have spent years building something — a collection, a business, a body of knowledge, a reputation — this is not an abstract idea. You have likely already felt the difference between seasons when your energy was focused and seasons when it scattered. Between the work that felt like grinding and the work that felt like it could go on indefinitely.

That second feeling is not luck. It is alignment. MISSION, AGENCY and CAPABILITY pointing in the same direction — and passion running through all three like light through a well-cut stone.

Finding your lane — and trusting it

One of the quieter disciplines in this field is learning what to say no to. A collector who buys everything becomes a hoarder. A curator who tries to represent everything represents nothing distinctly. A gem professional who chases every market trend loses the deep knowledge that makes their eye trustworthy.

The same is true of calling. Staying in your lane is not timidity — it is a form of mastery. It is the recognition that you have been given a specific sphere, specific tools, and a specific assignment, and that the most powerful thing you can do is inhabit that fully rather than chase adjacent opportunities that were never yours to begin with.

This is harder than it sounds. There will always be another role, another committee, another invitation that looks significant. The discipline — one I am still learning — is to return always to the same question: does this serve the mission I’ve actually been given? Does it require capability I genuinely have? Does it fall within the sphere where I have real agency?

If the answer to all three is yes, lean in. If not, let it go gracefully — and trust that whoever is meant to hold it will.

The fire inside the stone was always there. The cut just lets you see it.

Tay Kun Ming is the co-founder of The Gem Museum Singapore and has spent over 20 years sourcing coloured gemstones across Asia, Africa, and South America. The museum is located at 9 Perak Road, Little India, Singapore.

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