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The Planet Lurking within our Planet

March 2024

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Rock&Gem Magazine

When Theia Kissed Earth

The Planet Lurking within our Planet

It's been generally accepted among Earth and planetary scientists that a "protoplanet" the size of Mars directly impacted Earth as it was forming 4.5 billion years ago.

المزيد من القصص من Rock&Gem Magazine

Rock&Gem Magazine

Rock&Gem Magazine

THIS SUMMER, PICK STONY FLOWERS

Several rock and mineral formations look for all the world like flowers frozen in stone: chrysanthemum stones, flower agate, desert roses and poppy jasper.

time to read

6 mins

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

An Ocean's Worth of Water in Earth's Deep Mantle

Water is key to life as we know it. When seeking life beyond our planet, Earth and planetary scientists always seek out planets and moons suspected to harbor liquid water either on the surface or beneath icy crusts.

time to read

1 min

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

Hexagonal Diamonds?

Only available from the lab!

time to read

1 min

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

While the World Drowns, Greenland Rises

With a mile-thick ice sheet covering 80% of its surface, Greenland accounts for a fifth of current sea level rise as that ice melts on an increasingly warm Earth.

time to read

1 min

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

Argyle Diamonds

When the Argyle mine in Western Australia closed in 2020, it marked the end of one of the most remarkable chapters in modern mineral history.

time to read

2 mins

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

CHANGING MINERAL MARKETS

As Rock & Gem celebrates its 55th anniversary—no small feat for a print magazine in the digital age—the hottest commodities on today’s mineral markets are lithium, the rare-earth elements and gold.

time to read

3 mins

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

Grandpa's Agate Diggings

Finding Moss Agate on the Grande Ronde River

time to read

7 mins

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

Does This Fossil Reveal a Whole New Kingdom of Life?

They would have looked strange in the so-called Rhynie chert landscape of the ancient Scottish Highlands 407 million years ago.

time to read

1 min

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

From Maps to Satellites: Rockhounding's Tech Evolution

Rock and mineral collecting has come a long way, but the biggest changes have really occurred in just the past few decades.

time to read

5 mins

June 2026

Rock&Gem Magazine

Rock&Gem Magazine

BELLY of the DRAGON

A Rockhound's Guide

time to read

4 mins

June 2026

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