Named after a German forest. Made famous by a desert.
Described in Bavaria two centuries ago, ignored for most of them, and turned into a serious gem by two African finds in a single decade.
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1832
A garnet from the Spessart
The mineral is first described from the Spessart, a range of forested hills in Bavaria, and takes its name from it. It is a manganese aluminium garnet — manganese is what makes it orange — and for the next hundred and fifty years it stays a collector's mineral rather than a gem.
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1991
Mandarin, out of the Kunene
In the Marienfluss valley of northern Namibia, near the Kunene river, a deposit yields a pure, glowing orange nobody had seen in a garnet. The trade names it mandarin garnet. The find is small and largely worked out within a decade, but it establishes the colour as something people will pay for.
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Late 1990s
Nigeria takes over the supply
Deposits in south-west Nigeria begin producing the same orange in commercial volume and in larger sizes than Namibia ever did. Most fine spessartite on the market today traces back to this source, with Tanzania and Mozambique adding material of their own.
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Always
Nothing is done to it
Like every garnet, spessartite is not heated, not oiled, not irradiated. What you see is the colour manganese gave it in the ground. There is no treatment to disclose, and nothing that can change later.
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The enemy
Iron, and what it costs
Spessartite rarely occurs pure. It usually sits on a chemical bridge towards almandine, and the iron that comes with it pushes the colour from clean orange towards brownish red. Every step along that bridge takes value off the stone, which is why the pure orange commands what it does.
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Today
The colour no other stone gives you
Nothing else in the coloured stone world delivers this orange at this hardness without treatment. Fire opal is softer and fragile, padparadscha sapphire costs many times more, and imperial topaz cleaves. Spessartite is the practical answer.