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Dark matrix Vanadinite specimen

The Story of Vanadinite

By Bob Jones One of the more attractive and popular lead minerals is vanadinite, a lead chloro-vanadate. Vanadinite as a collector mineral has been around for...
Zirconium silicate

Rock Science: Zircon, Zirconium and Zirconia

By Steve Voynick Despite similar-sounding names, zircon, zirconium, and cubic zirconia refer respectively to a mineral, an element, and a synthetic material. Zircon is the mineral...
Glauberite pseudomorph1

Glauberite: It’s Not Always What It Seems

By Jim Brace-Thompson Do you have a mineral labeled “glauberite” in your collection? I do, but I recently learned that it may not be what...
Wickenburg nodule

Date Creek Quartz and Wickenburg Nodules

Story and Photos by Alice Sikorski Also known as the Joshua Tree Parkway, the stretch of U.S. Highway 93 from Interstate 40, just east of...
Primary Malachite

Malachite Morphology — Part I

Editor's Note: This is the first of a two-part series.  By Bob Jones Green malachite is found in a pleasing variety of forms. In fact, the...

Rockhounding Road Trip: The California Rock Garden

Editor's Note: This is the latest installment of the rockhounding travels of Thomas Farley, as he gathers materials for a book about rockhounding in...
The Dome of Topaz Mountain

Topaz Mountain Rockhounding Adventure

Story and Photos by Mark Leatherman The last time I had gone on a true mineral-hunting “vacation” was way back in 2005, when I went...
Red Rock Country Utah

Rock Science: The Colors of Hematite

By Steve Voynick Mineral collectors are familiar with the silvery-black color and submetallic luster of the crystalline and botryoidal forms of hematite. But most hematite...
Arsenopyrite specimen Panasquiera

Arsenic Family Minerals Part I: Liroconite, Clinoclase, Olivenite and Chalcophyllite

Story by Bob Jones Arsenic is a lethal poison, but nature uses it to create some very beautiful minerals. We are all familiar with the...
Olivine crystals

Rock Science: The ‘Gemstones’ of Kilauea

By Steve Voynick In mid-June, Hawaii’s Kilauea volcano was reported to be “raining green gemstones.” The internet carried images of green crystals that local residents...