CATEGORIES

ROOSEVELT DAM AGATE: A Gem Loaded with History

The Roosevelt Dam agate is a very limited-occurrence lapidary material, uncovered during the excavation of the Theodore Roosevelt Dam in Arizona, hence the obvious name of Roosevelt Dam agate.

4 mins read
Rock&Gem Magazine
February 2021

GEORGIUS AGRICOLA'S: DE RE METALLICA

465 Years Old and Still Relevant

10+ mins read
Rock&Gem Magazine
February 2021

Trisparkle 12 Design Marks New Approach

I want to thank Jim Perkins for his many years of providing outstanding faceting designs for the Rock & Gem readership.

2 mins read
Rock&Gem Magazine
February 2021

Scientists Looking at a Possibly Undetected Volcano in Alaska

Is there a previously undiscovered volcano within Alaska’s Aleutian chain of islands? A team of scientists recently presented their findings surrounding this possibility during a meeting of the American Geophysical Union (AGU).

3 mins read
Rock&Gem Magazine
February 2021

QUARTZ

COMMON, BUT NOT CONVENTIONAL

8 mins read
Rock&Gem Magazine
February 2021

Discovering the Splendor of SLAG

A pile of slag remaining from copper smelting operations of 1930s Cottonwood, Arizona is one area of focus for Minerals Research, Inc. (MRI), the company pursuing a 15-20 year process to remove the pile using innovative recovery technology.

10 mins read
Rock&Gem Magazine
February 2021

HUNTING FOR THUNDEREGGS

Uncovering A “Ghost” Volcano’s Treasures

7 mins read
Rock&Gem Magazine
February 2021

CERUSSITE

GALENA’S GIFT OF A STUNNING SECONDARY MINERAL

7 mins read
Rock&Gem Magazine
February 2021

Anxiously Awaiting a New Museum Opening

With the year 2021 upon us, Arizona collectors are certainly excited about the pending May opening of the University of Arizona Alfie Norville Gem & Mineral Museum in downtown Tucson. Of course, the excitement extends beyond the border of Arizona and to far reaching locales around the globe.

7 mins read
Rock&Gem Magazine
February 2021

Captivated By Copper

Soldiers’ Discovery Leads to a Century of Mining at Pearl Handle Open Pit

7 mins read
Rock&Gem Magazine
February 2021

Filling an Empty Space and Enhancing a Cabochon

I often look for a special feature within a slab when choosing the shape to cut into a cab.

2 mins read
Rock&Gem Magazine
January 2021

Pterodactyls No Longer Birds of a Feather?

For a couple of decades now, feathered dinosaurs have been all the rage.

3 mins read
Rock&Gem Magazine
January 2021

The Saga of COLORADO GOLD - 53 Million Troy Ounces and Counting

Colorado has been mining gold even before the region became a territory and is still mining it today.

10+ mins read
Rock&Gem Magazine
January 2021

SPECTACULAR NATIVE SILVER - Rarer Than Gold in Specimen Form

When it comes to naturally occurring precious metal specimens on Earth, finding native silver is not as easy as finding native gold.

7 mins read
Rock&Gem Magazine
January 2021

PEARL OF THE PACIFIC - San Diego's Pacific Rim Park

Did you know, the Pearl of the Pacific was created in 1998 as a symbol of friendship and unity between the United States, Mexico, China and Russia?

4 mins read
Rock&Gem Magazine
January 2021

POPULAR PSEUDOMORPHS - More Common Varieties Enhance Any Collection

In part one of this two-part series, which appeared in the December 2020 issue of Rock & Gem, we explained pseudomorphs as minerals whose normal form has changed, so they may look like the original but are now another mineral.

7 mins read
Rock&Gem Magazine
January 2021

New Era Gems - CARVING A PATH AND CREATING A LEGACY

Think back to your 20th birthday; what were you doing? How did you celebrate?

4 mins read
Rock&Gem Magazine
January 2021

DIAMONDS - A Luxury Gem Steeped in Fact & Fable

The diamond is one fabled gemstone! For example, google “Hope Diamond” to see all the legends associated with just this one stone said to bring misfortune to its owners.

2 mins read
Rock&Gem Magazine
January 2021

Cleaning Without Chemicals

Do you have specimens like desert roses, quartz crystal clusters, or geode halves that sat for eons in the open before being collected?

1 min read
Rock&Gem Magazine
January 2021

Black Ilmenite and “Titanium White”

The bright-white color that we see in everything from highway lines, donut icing, and tooth-paste to paint, paper, plastics, and ceramics comes mostly from titanium dioxide, the world’s most widely used pigment.

3 mins read
Rock&Gem Magazine
January 2021

POPULAR PSEUDOMORPH MINERALS

More Than They Seem

7 mins read
Rock&Gem Magazine
December 2020

Prehistoric Birds Take Flight and Pique Public Interest

Birds have really taken flight these past two decades—ancient birds, that is! A flurry of new research has led to a flurry of books with titles like Dinosaurs of the Air, The Mistaken Extinction: Dinosaur Evolution and the Origin of Birds, Mesozoic Birds: Above the Heads of Dinosaurs, and The Rise of Birds, among others.

4 mins read
Rock&Gem Magazine
December 2020

Uncommon Dinosaurs

Southern Continents Reveal Uncommon Giants

10+ mins read
Rock&Gem Magazine
December 2020

ZOISITE

A Massive Mineral Marked by Christmas- Like Color and Appeal

7 mins read
Rock&Gem Magazine
December 2020

Odie House

A good friend, and wonderful artisan both lapidary and silversmith h, Odie is always fun to chat with. There is always something beautiful to see when Odie is in the “house.”

3 mins read
Rock&Gem Magazine
December 2020

PLEASING PYROPE

Italy’s Uniquely Valuable Variety of Garne

6 mins read
Rock&Gem Magazine
December 2020

Joplin

Field Trip Findings: Gaining More Than Mineral Specimens

7 mins read
Rock&Gem Magazine
December 2020

GEOLOGY 101 Columnar Basalt

A distinctive volcanic structure found throughout the world has been given fanciful names: “Organ Pipes” in Namibia and Victoria, Australia; “Kilt Rock” and “Samson’s Ribs” in Scotland; “Giant’s Causeway” in Northern Ireland; “Thunderstruck Rocks” in Romania; “Devils Tower” in Wyoming and “Paul Bunyan’s Woodpile” in Utah, USA; the “Baigong Pipes” in China; and the “Cliff of Stone Plates” in Vietnam. High-resolution satellite images have even shown similar as-yet-unnamed structures on Mars.

1 min read
Rock&Gem Magazine
December 2020

Sanding and Polishing Thundereggs

Two basic lapidary machines can be used to sand and polish thunderegg halves quickly. Both involve sanding the pieces dry.

2 mins read
Rock&Gem Magazine
November 2020

Studying Nature's Impact on Ancient Civilization and Tuning In Online to Make Sense of Meteorites

Okmok. In remote Alaska. A strange name and a strange place for what some scientists and historians now say caused the downfall of the Roman Republic and the Egyptian Ptolemaic Kingdom shortly after the demise of Julius Caesar.

3 mins read
Rock&Gem Magazine
November 2020

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