THE UNITED STATES GEOLOGICAL SURVEY

FIELD NOTES

As I promised in the September issue, this issue contains

TANZANITE A RARE AND REMARKABLE TRICHROIC GEM

Discovered just over 50 years ago, tanzanite is one

Heat Treating Agates

Many years ago, I did some heat treating of agates

Turquoise Travels

Visiting Albuquerque’s Turquoise Museum Castle

Captivated by Magma and Moon Rocks

A recent issue of the journal Science noted how volcanic

Gems & Minerals of MAINE

An Annual Conference and a New Museum Draw Interest

A Study in Carving Crossing the Globe to Learn the Art of Agate Carving

When I retired in 2014 from a career as a goldsmith

Astrophyllite

Astrophyllite is one mineral that certainly lives up

North Dakota’s Teredo Petrified Wood

North Dakota sports just a single state rockhound symbol

JUST OFF THE WHEELS Julie Poe

Erin Dana Balzrette: Where is this material from, and

Myanmar’s Cretaceous Amber

While translucency, attractive golden-yellow colors

Inspiring Vistas and Adventures

A group of 22 people enjoyed a cool and cloudy rockhounding

TIMBERWOLF QUARTZ

Unique Termination Prompts Intrigue

Flowering Tube Onyx

Flowering Tube onyx is an incredibly unique stone that

Color in Gems

Of all the elements on the Periodic Table, a small

STOLZITE

This specimen of Stolzite, reportedly among the largest