A Tale of Two Ounces: When 28 Isn’t Quite 31
It sounds like the start of a dull kitchen mishap, but it’s actually a quiet little trap that catches people in the gold and silver world all the time: not all ounces are created equal.
In the kitchen, an ounce is part of the everyday avoirdupois system — the one used for weighing flour, butter, or a decent steak. One of these ounces weighs 28.35 grams. Simple enough, and perfectly suited to recipes and groceries.
But step into the world of precious metals and you’re suddenly dealing with the troy ounce — and that’s a different beast entirely. A troy ounce comes in at 31.1 grams, a noticeable step up. It’s the standard used globally for gold, silver, platinum — the serious stuff.
Why the difference? Blame history, as usual. The troy system dates back to medieval trading markets in France, while the everyday ounce evolved separately in England. Two systems, both stubbornly surviving into modern life, quietly waiting to trip up the unwary.
The real-world consequence is simple but important: if you think you’re buying an ounce of silver and you’re picturing kitchen scales, you’re underestimating what you’re getting. Or worse — if you’re selling and get it wrong, you could be giving value away without even realising.
It’s a small distinction, but in a world where margins matter, small things add up quickly. In metals, as in life, it pays to know exactly what’s on the scales.
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