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Rock&Gem Magazine - July 2025

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इस अंक में

KINGSTON NEW MEXICO QUARTZ CRYSTALS
By Robert Beard

THE NORTHERN ARC OF THE PACIFIC RING OF FIRE
By Sue Eyre

STATE ROCKS, MINERALS & GEMSTONES
By Steve Voynick

What Really Caused the Biggest Extinctions

As long as there's been life on Earth, there has been extinction.

1 mins

To Create New Species, Raise High the Mountains

It seems like plain old common sense. Increase the complexity and diversity of topography and you'll increase biodiversity. But now we have strong data to support that hypothesis.

1 mins

Pterosaurs Are Flying High!

Pterosaurs were remarkable flying reptiles soaring the skies above dinosaurs.

1 mins

Is Earth’s Mantle More Interesting than Imagined?

Earth has been described as a layered onion with an inner core, an outer core, a mantle and a crust.

1 mins

Finding the Phosphorus Feeding Early Life

The biomolecules fueling life on Earth are heavily dependent on phosphorus. In fact, phosphates are said to be the second-most abundant mineral in the human body.

1 mins

The New Moons of Saturn But are they really moons?

If you'd been asked just a couple months ago, “How many moons circle Saturn,” you would have confidently answered, “Why, 146, of course!” Well, try 274!

1 mins

The Color of Early Mammals

Pretty dull!

1 mins

Deep Aquifers Aren't Easily Recharged

Recent times have seen severe drought conditions and increased reliance on groundwater aquifers to draw fresh water to meet the needs of ever-expanding populations.

1 mins

A Moon as Old as Earth? Almost!

Earth is estimated to be 4.543 billion years old, and it's believed our Moon was born from a violent collision between the newly formed Earth and another young Mars-sized protoplanet dubbed Theia not long thereafter. But how long was \"not long?\"

1 mins

The More Things Change, the More They Stay the Same

Eucalyptus trees have been bugged for 52 million years!

1 mins

Jolted Alive by Microlightning?

Ancient asteroids hold all the right organic compounds for life, and those same compounds were likely present on early planet Earth-or delivered here by impacting asteroids.

1 mins

Earth's Oldest Impact Crater Yet

Scientists estimate the age of Earth at 4.543 billion years.

1 mins

Kingston New Mexico Quartz Crystals

Finding Starburst Quartz Crystals in the Black Range

8 mins

HARDROCK GAMES

The Enduring Appeal of Mine-Drilling Contests

8 mins

The Northern Arc of the Pacific

Geology of Alaska & the Aleutian Islands

6 mins

State Rocks, Minerals & Gemstones

A Collective Look at our Geosymbols

8 mins

SUNSET PEAR

By day, Julia DeLo works as an engineer in the aerospace industry and by night, she pursues her passion for cutting gemstones, applying her analytical and mechanical skills to optimize and simplify designs.

2 mins

ROCK & GEM FIELD GUIDES

Emerald is the green variety of beryl, colored by trace amounts of chromium and sometimes also vanadium.

2 mins

THE FIREWORKS INSIDE AN OPAL

Forget waiting for the Fourth of July.

4 mins

POLISH FLINT

Flint has often been used throughout history and is thought to be as old as 160 million years.

2 mins

Exploring Oregon Beach Fossils

There's an old saying that finding fossils in Oregon is not about where to look, but where not to look.

6 mins

Not All Gold Is Created EQUAL

Understanding the Differences Between Colors & Alloys

6 mins

Bound by Earth, Forged by Friendship

You can't fake a real connection — and you sure can't force five women to dig side-by-side through dirt, sweat and storms unless something powerful is holding them together.

3 mins

THE GEOLOGY OF WINE

At wine tastings today you're likely to find “flinty” sauvignon blancs, “chalky” Rieslings, and syrahs that “express the essence of limestone soil.”

4 mins

सभी कहानियाँ पढ़ें Rock&Gem Magazine

Rock&Gem Magazine Description:

प्रकाशक: EG-Media-Investments-LLC

वर्ग: Hobbies_Craft

भाषा: English

आवृत्ति: Monthly

Rock & Gem has been the leading magazine for the lapidary and mineral hobbyist. Not a trade journal and not a scientific dissertation, it speaks to the average rock hound, providing just the right blend of entertainment and satisfying information. Armchair hobbyists and diehard diggers alike will find something to enjoy in each issue.

Lifetime hobbyist and Carnegie Award winner Bob Jones heads up a group of experienced and knowledgeable contributors. Bob’s light - hearted style brings readability to in-depth articles on minerals, classic deposits, and collecting trends. His Frugal Collector series helps collectors learn to identify mineral bargains, and his affiliation with the Tucson Gem & Mineral Society provides a behind-the-scenes look at the year’s biggest and best mineral show and sneak previews of the show’s theme and featured exhibits.