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Subduction Is Alive & Well on Venus

Rock&Gem Magazine

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September 2025

Venus is often called Earth's Evil Twin.

Subduction Is Alive & Well on Venus

While similar in size and position in the solar system, the similarities seem to end there, with Venus proving much more inhospitable. Care for a sulfurous atmosphere and surface temperatures and pressures that can melt lead? But we now know Earth and Venus apparently have another similarity: active plate tectonics, of sorts.

WEITERE GESCHICHTEN VON Rock&Gem Magazine

Rock&Gem Magazine

Rock&Gem Magazine

DUNCAN POPPY JASPER

Every year comes the chance to find something new, whether in the field or the marketplace. This year, a new type of jasper appeared in the rockhound community on Facebook, catching quick attention for its bright variety of colored poppy jasper.

time to read

2 mins

September 2025

Rock&Gem Magazine

PSEUDOFOSSILS - "Fossils" That Aren't!

Several mineral growths look for all the world like fossils.

time to read

4 mins

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

MOSAIC

In January 2025, a group of designers was challenged to create or modify a design for iolite that would show off the gem's pleochroism and that would work for the material's lower refractive index and minimal dispersion. Jeffrey Hill's “Mosaic” is a straightforward design where rough can be oriented to showcase the greys and blues or oriented to show a mixing of the colors.

time to read

2 mins

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

SALAR DE UYUNI

While relatively few people have ever visited the immense salt flat known as Salar de Uyuni (sa-LAR day ooh-yooni), millions have seen it on the big screen. In the 2017 movie Star Wars: The Last Jedi, Salar de Uyuni was the filming location for the fictional Crait, a small planet where white salt covers bright-red, mineral-rich soil, and the Resistance fought the First Order in a climactic battle.

time to read

3 mins

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

Meramec Station Road Calcite

Finding calcite in Limestone Cliffs near St. Louis

time to read

7 mins

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

SPACE ROCKS

Exploring the Asteroid Belt's Ancient Rocks

time to read

5 mins

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

Subduction Is Alive & Well on Venus

Venus is often called Earth's Evil Twin.

time to read

1 min

September 2025

Rock&Gem Magazine

Sri Lanka: The Gem Island

Ceylon, Sapphires & Serendipity

time to read

6 mins

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

Deinosuchus

An alligator no more!

time to read

1 min

September 2025

Rock&Gem Magazine

Rock&Gem Magazine

ROCK & GEM FIELD GUIDE: Oregon Sunstone

Sunstone is the transparent, gem-quality variety of the mineral labradorite, a calcium-rich feldspar in the plagioclase series.

time to read

1 mins

September 2025

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