The Fastest Way Up

The diamond kept arriving as dust.

On the big glass floor of the Deep Earth Center, a bright point began far below Maya’s shoes, somewhere under the painted label that said one hundred seventy kilometers. It rose through glowing red layers, slowed politely at each stop so visitors could read the labels, and reached the surface as a gray smear.

The display made a sad chime.

Dr. Voss slapped the side of the control stand. 'Again.'

Soren wrote the word dust in his notebook and circled it twice. Everyone else at the center used wrist screens. His notebook had a bent cardboard cover and a pencil tied to it with string because he had lost three pencils that week and did not believe in a fourth.

Maya crouched on the glass. The smear faded. Deep under her knees, the bright point reset itself in the mantle.

'It is not dying at the end,' she said.

Dr. Voss had silver hair pinned up with two rock hammers. She was wearing one boot and one shoe. Her other boot sat under the coffee machine, for reasons no one had explained.

'The sensor is too delicate,' Dr. Voss said. 'It wants a perfect crystal. Visitors want sparkle. Donors want sparkle. I want six minutes where nothing embarrassing happens.'

'It starts wrong,' Maya said.

Dr. Voss looked at the clock, then at the closed front doors, then at the ceiling as if another geologist might fall through it and take over. 'You two have fifteen minutes. If you can make the diamond arrive looking like a diamond, I will name a button after you. Not a large button.'

She limped toward the lobby with her tablet buzzing in her hand.

The simulator reset. A tiny white dot glowed far below the floor.

Soren did not touch the controls yet. He liked broken things better before anyone tried to fix them. Broken things told the truth badly, but at least they were telling it.

'What made you say it starts wrong?' he asked.

Maya pointed to the red path. It spread upward in a wide, lazy plume, like syrup in water.

'That is a volcano trying to be polite,' she said.

The control panel offered settings with cheerful names. Gentle Eruption. School Group. Museum Safe. Sparkle Mode.

Soren opened the expert tab. The cheerful colors vanished. Numbers appeared. Depth. Pressure. Temperature. Volatile content. Ascent rate. Pipe width.

'It says diamond stability field,' Soren said. 'That is where it forms.'

'How far?'

'One hundred fifty to two hundred kilometers down.'

Maya pressed her palm flat to the glass. 'That is not under the basement.'

'No.'

'That is under everything.'

The floor dimmed. For one second the visitor center disappeared from the reflection, and Maya saw only the white dot below her hand, lower than caves, lower than oil wells, lower than the deepest drill humans had ever made. Not hidden in a treasure chest. Not grown in a ring shop. Pressed into being where rock was hot enough to glow and heavy enough to squeeze carbon into a shape that could cut glass.

Then the labels blinked back on.

Soren found the speed setting. 'It is set to walking pace.'

'For magma?'

'For visitors.'

Maya made a face.

Soren scrolled farther. A warning box opened.

KIMBERLITE ASCENT MAY BE SUPERSONIC IN ERUPTION MODEL. AUDIO LIMITERS RECOMMENDED.

Maya leaned closer. 'Supersonic.'

'Faster than sound,' Soren said.

'I know what it means.'

'I was saying it because my mouth wanted to try it.'

Maya smiled without looking away.

Soren changed walking pace to supersonic. The panel refused him.

DISPLAY PATH TOO BROAD FOR KIMBERLITE PIPE.

'Pipe,' Maya said.

She ran to the wall map. It showed the old pipe below the center as a black carrot shape, narrow at the bottom, wider near the top. Around it were photographs of strange stones found in soil before anyone dug: red garnet, black ilmenite, green chrome diopside. Indicator minerals, the label said.

Maya opened the specimen drawer beneath the map. Inside were small trays, each with grains of rock no bigger than seeds.

Soren came over. 'Those are not diamonds.'

'No,' Maya said. She lifted a tray of purple-red grains. 'They are the ones that do not belong.'

Soren read the label. 'Pyrope garnet. From deep mantle rocks. Prospectors follow them back to kimberlite.'

Maya held one grain on her fingertip. It looked too bright for dirt and too small for anyone to make a fuss about. A misfit speck that could point to a pipe from the deep Earth.

Soren looked from the grain to the glass floor. 'The simulator is looking for the prize at the end.'

Maya was already moving. 'Make it look for the trail.'

At the controls, Soren changed the starting clue from diamond to indicator minerals. The model redrew itself. The broad plume pinched inward until it became a dark, narrow throat rising through the floor.

Maya tapped the pipe width smaller. Soren raised the volatile content. The ascent rate box turned amber, then red.

'It is complaining,' Maya said.

'It is warning,' Soren said. 'Different.'

'Do you believe the warning?'

Soren looked at the numbers. He looked at the gray smear left from the failed run, still ghosted on the display. 'I believe the slow version makes dust.'

He pressed Run.

The center went silent so suddenly Maya heard the lobby doors sigh in their tracks.

Far below, the white point appeared again. Around it, other flecks shivered into view, purple, green, black. The dark pipe opened underneath them.

The countdown skipped from ten to three.

'That seems unfriendly,' Soren said.

'That seems honest,' Maya said.

The floor kicked.

The white point did not float upward. It shot. The pipe flashed black around it, then red, then black again. A boom rolled through the soles of Maya’s shoes and up her legs. Soren grabbed the rail with one hand and the control panel with the other, not to stop it, just to stay with it.

The diamond reached the surface in less than a breath.

This time the display did not chime.

A clear case rose from the center of the floor. Inside it, a tiny crystal burned with hard white light. Around it, the colored indicator grains settled like sparks that had remembered how to become stones.

From the lobby came Dr. Voss’s uneven footsteps, one boot loud, one shoe soft.

'What did you do to my six-minute educational experience?' she asked.

'Shortened it,' Maya said.

Soren pointed at the dark pipe still glowing under the glass. 'It was not a lava-lamp problem. It was a delivery problem.'

Dr. Voss stared at the case. Then she stared at the path below it. Her tablet buzzed. She ignored it.

'The donors are in the parking lot,' she said.

Maya waited.

Dr. Voss picked up her missing boot from beneath the coffee machine and put it on without sitting down. 'The button will be medium-sized.'

The front doors opened. Voices filled the lobby, bright and adult and expectant.

Dr. Voss looked at the specimen drawer, then at the sparkling crystal. 'What should they see first?'

Maya picked up the small tray of purple garnets. Soren slid open the empty case at the start of the walkway.

The countdown began again.

Maya tipped one purple grain into the case, and it jumped when the floor boomed.