The quartz is on the windowsill where you left it yesterday. This morning the light is coming in low, the kind of light that finds the underside of things. You pick it up. You turn it once. And there, suspended inside, is a thin gold thread you did not see before. Then another beside it. Then a faint flat plane near the termination, like a window inside the window. The stone has not changed. The light has. The whole interior weather of it is showing itself now, all at once, on a Tuesday morning.

Most people are taught to look at the colour first. The colour is the loudest thing, so it gets the attention. But the colour is rarely where the stone keeps its history. The history is in the inclusions. The history is in the veils. The history is in the small fractures that throw rainbows when you tilt them past a certain angle. Look at the inclusions before the colour. Everything the stone has to say about how it came to be in your hand is in there, written small.

A rutile thread is the easiest place to begin. Those fine gold or copper needles inside a quartz are titanium dioxide, grown in the same hot fluid as the quartz itself but on a different schedule. The needle started first. The quartz grew around it. What you are looking at is two minerals that agreed to share a space. When the needles are dense and crossing, the stone formed slowly, in a pocket that stayed open a long time. When they are sparse and parallel, the pocket closed faster. The thread tells you the pace of the room it grew in.

A phantom is a different kind of record. It is a ghost of an earlier termination, sealed inside the current stone because growth stopped, dust settled on the face, and then growth resumed over it. You can see the old point inside the new one, sometimes two or three of them stacked like nested rooms. A phantom is the stone telling you that its life had pauses. That it was not one continuous becoming. That there were seasons.

Veils are the most quiet of the four. A veil is a healed fracture — the stone cracked while it was still growing, and the same fluid that made it filled the crack and kept going. Held to the light, a veil looks like a thin sheet of mist suspended inside clear material. You can pass your eye through it and out the other side. The veil is the stone forgiving its own break. The cleave tells the truth, but the veil tells the rest of it.

And then the rainbow fractures. These are not healed. These are the small internal partings where two faces of the stone almost separated and did not — and now, where the gap is thinner than a wavelength of light, the light splits as it crosses. Tilt the stone slowly under a lamp. The rainbow will arrive at one angle and leave at the next. It is not a flaw in the way a chipped corner is a flaw. It is a place where the stone is being honest about having been under pressure.

The interior of a stone is not decoration. It is the record.

Which is why the identification books that lead with colour and hardness, useful as they are, only get you to the doorway. The mineral name is the doorway. What you do once you are through it — what you notice when you hold the loupe to the cool side, what you find when you turn the piece a quarter turn under the lamp — that is the actual conversation. Two quartzes from the same shelf will have two different interiors, and the difference is the whole point. The species is the shared language. The inclusions are the sentence.

So when you pick up the next stone, hold it to the light first. Not the overhead light. The window light, low and slow, the kind that comes in sideways. Let your eye go past the surface and into the body of it. Look for threads. Look for ghosts. Look for the veil that wasn't there yesterday. The stone has been carrying all of this the whole time. You are only now in the right light to see it.

This one has been waiting. The interior is already there. The reading is the part you do slowly, on a quiet morning, with the stone in your fingertips and the lamp at the right angle. The moon will tell us when to set it down again. For now, the light is good. Already in motion.