Stones
The stone directory
One page per mineral: the signs that give it away, the lookalikes to watch for, and the test that settles it in thirty seconds.
Agate
Banded, translucent, born in a bubble of lava — and frequently dyed.
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Amethyst
Purple quartz, and the five stones people mistake it for.
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Obsidian
Volcanic glass: translucent at the edges, sharper than a scalpel, and routinely mistaken for factory waste.
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Pyrite
Fool's gold: how to name it, and why it eventually destroys itself.
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Rose quartz
Cloudy, massive, hardness 7: the commonest pink stone and its lookalikes.
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