Proterozoic Supergroup Formations at Hance Rapids, Grand Canyon National Park Proterozoic Supergroup Formations at Unkar Delta, Grand Canyon National Park Paleozoic Formations at South Rim, Grand Canyon National Park

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Product Reviews
The UVTools M100 Ultraviolet Light Kit
GemOro Stereo Microscope
Meiji Techno Binocular and Trinocular Stereo Microscopes
Raynox Video MicroExplorer
The Photo-Atlas of Minerals CD
OsoSoft MineralLabel 5.0 - Now Freeware!
Belomo 10x Loupe: An Inexpensive Russian Triplet
$8 BIRI Russian Radiation Detector

Alone No More
Martian Meteorite ALH84001 Harbinger of Extraterrestrial Life
Check out Bob's Martian Touchdown - A Rockhound's Cosmic Encounter with Three Extraterrestrials


Curiosity Mars Rover

Curiosity on Mars
The Landing: Another Small Step for Man - A Giant Leap for Robot Kind
The Landing Site: The Geological Jackpot at Gale Crater
Curiosity: The Escalade of Mars Rovers
The Science Payload: Rock Zappers and the Search for Biosignatures
Want to Know More? References and Further Reading

Curiosity Finds Conditions Once Suited For Ancient Life On Mars: An analysis of a rock sample collected by Curiosity shows ancient Mars could have supported living microbes. The data indicate the Yellowknife Bay area the rover is exploring was the end of an ancient river system or an intermittently wet lake bed that could have provided chemical energy and other favorable conditions for microbes. The rock is made up of a fine-grained mudstone containing clay minerals, sulfate minerals and other chemicals. This ancient wet environment, unlike some others on Mars, was not harshly oxidizing, acidic or extremely salty.


Mars Trip Beyond Astronauts' Radiation Limits: Radiation levels measured by the Mars Curiosity rover while in flight reveal that astronauts would exceed exposure limits during a round trip mission to Mars.
Pebbly Rocks Testify to Old Streambed on Mars: The rocks are the first ever found on Mars that contain streambed gravels. The sizes and shapes of the gravels embedded in these conglomerate rocks - from the size of sand particles to the size of golf balls - enabled researchers to calculate the depth and speed of the water that once flowed at this location.
Curisoity Drills Second Rock: Curiosity has used the drill on its robotic arm to collect a powdered sample from the interior of a rock called "Cumberland". The hole that Curiosity drilled into Cumberland is about 0.6 inch in diameter and about 2.6 inches deep.
Second Drilling Target Selected: The team operating Curiosity has selected a second target rock for drilling and sampling, a concretion bearing rock named "Cumberland". Curiosity will set course to the drilling location in coming days.
Remaining Martian Atmosphere Still Dynamic: Mars has lost much of its original atmosphere, but recent findings from NASA's Mars rover Curiosity indicate what's left remains quite active.
Curiosity's Parachute Flaps In Martian Wind: A sequence of photos from NASA's Mars Reconnaissance Orbiter show how the parachute that helped Curiosity land on Mars last summer has subsequently changed its shape on the ground.
Curiosity Resumes Science Investigations: Curiosity has resumed science investigations after recovery from a computer glitch that prompted the engineers to switch the rover to a redundant main computer.
Sun in the Way Will Affect Mars Missions In April: The positions of the planets next month will mean diminished communications between Earth and NASA's spacecraft at Mars. Mars will be passing almost directly behind the sun, from Earth's perspective.
Curiosity Exits "Safe Mode": Curiosity has returned to active status and is on track to resume science investigations, following two days in a precautionary standby status, "safe mode." Next steps will include checking the rover's active computer, the B-side computer, by commanding a preliminary free-space move of the arm.
Curiosity Initiates "Safe Mode": The safe-mode entry was autonomously triggered when a command file failed a size-check by the rover's protective software. Engineers subsequently diagnosed a software bug that appended an unrelated file to the file being checked, causing the size mismatch.
Curiosity Sees Trend In Water Presence: Using infrared-imaging capability of a camera on the rover and an instrument that shoots neutrons into the ground to probe for hydrogen, Curiosity has found evidence of water-bearing minerals in rocks near where it had already found clay minerals inside a drilled rock.
Panorama From Curiosity Details Mount Sharp: Rising above the present location of Mars rover Curiosity, higher than any mountain in the 48 contiguous states of the United States, Mount Sharp is featured in new imagery from the rover. A pair of mosaics assembled from dozens of telephoto images shows Mount Sharp in dramatic detail.
Curiosity's Recovery Moving Forward: Curiosity continues to move forward with assessment and recovery from a memory glitch that affected the rover's A-side computer. Curiosity has two computers that are redundant of one another. The rover is currently operating using the B-side computer, which is operating as expected.
More Curiosity in the News

Powerful new twin NASA Mars rovers, Spirit and Opportunity, have successfully landed and deployed on different regions of the Red Planet. With far greater mobility than the 1997 Pathfinder rover, these robotic explorers may trek as much as 40 meters across the surface in a day. Each rover carries a sophisticated set of instruments search for evidence about whether past environments at selected sites were wet enough to be hospitable to life. Rocks and soils will be analyzed with a set of five geology instruments on each rover, and a special tool called the rock abrasion tool, or "RAT", will be used to expose fresh rock surfaces for study.
The Mars Exploration Rovers Mission
Mars Rover Fact Sheet
Mars Rovers Take Baby Steps
The Athena Mars Rovers Science Payload
The Geological History of Mars
The Surface of Mars
The Search for Extinct Life
The Search for Extant Life
Mars Landing Site Catalog
Mars High Resolution Global Mosaic
Mars Image Navigator
The Interior of Mars
Panorama of the 'Payson' outcrop on the western edge of Erebus Crater imaged by the Opportunity rover 02-26-2006
Opportunity Rover Mission Updates:
May 24, 2013:  Opportunity Departing 'Cape York'
May 20, 2013:  Record-Setting Drive by Opportunity
May 10, 2013:  Making Smallest Turn Yet, As Dust Storm Affects Opportunity
May 02, 2013:  Opportunity Back in Action
Apr 12, 2013:  Waiting Out Solar Event
Apr 10, 2013:  Quiet Period for Next Three Weeks
Mar 29, 2013:  Opportunity Moves Into Place for Quiet Period of Operations
Mar 21, 2013:  Opportunity Heads to Matijevic Hill
Mar 05, 2013:  Opportunity Departing South Soon
Mar 12, 2013:  Opportunity Examining Rock Surfaces After Reset
Mar 01, 2013:  Short Bump Gets Robotic Arm Closer to Rock Target
Spirit Rover Mission Updates:
May 24, 2011:  Spirit Remains Silent at Troy

Stack of sedimentary structures exposed at Payson Ledge on the western edge of Erebus Crater imaged by the Opportunity rover 03-03-26 Bolders of vesicular basalt along the edge of a lava flow at Lorre Ridge imaged by the Spirit rover 01-23-06 Coarse-grained layers of possible explosive origin from the edge of the Home Plate plateau inside Gusev Crater imaged by the Spirit rover 02-10-06 Volcanic rock fragments littering the slope of Low Ridge imaged by the Spirit rover 04-13-06

Rocks in the News
5-Day Silver Price History    5-Day Gold Price History
Detailed Silver Price Historical Chart    Detailed Gold Price Historical Chart

Ancient Egyptians Accessorized With Meteorites: Researchers have found conclusive proof that Ancient Egyptians used meteorites to make symbolic accessories for their dead. Meteorite iron had profound implications for the Ancient Egyptians, both in their perception of the iron in the context of its celestial origin and in early metallurgy attempts.
Exo-Planet Hunting Kepler Spacecraft Malfunctions: NASA’s planet-hunting Kepler spacecraft has been shut down by the failure of one of the reaction wheels that keep it pointed, robbing it of the ability to point precisely enough to detect Earth-size planets. Mission engineers characterize a possible fix as a 'long-shot'.
Fossil Muddies The Origin Of Birds: A birdlike fossil that dates to roughly 155 million years ago is ruffling the feathers of some paleontologists. At issue is whether the fossil is a dinosaur, an early bird or something in between.
Dog-sized Dino Shows Prehistoric Diversity: The discovery of a new thick-skulled dinosaur the size of a large dog may challenge our image of a prehistoric Earth dominated by supersized lizards. About 1.8 metres from nose to tail and weighing in at 40 kilograms, the animal had a ridge of solid bone more than 10 centimetres thick on the top of the skull - possibly used in head-butting contests.
Earth's Core Moves To Its Own Beat: The Earth's core is out of sync with the outer crust of the planet, frequently speeding up and slowing down from decade to decade.
Moon and Earth Have Common Water Source: Researchers using a multicollector ion microprobe to study hydrogen-deuterium ratios in lunar rock and on Earth have concluded the Moon's water did not come from comets but was already present on Earth 4.5 billion years ago, when a giant collision sent material from Earth to form the Moon.
Kansas Was Unbearably Hot 270 Million Years Ago: The Permian period was hot, hot, hot. Microscopic bubbles of saltwater included in Kansas halite crystals provide evidence that air temperatures near the equator may have soared to 165° Fahrenheit.
Origin of Life: Power Behind Primordial Soup Discovered: A new study shows how a chemical, similar to one now found in all living cells and vital for generating the energy that makes something alive, could have been created when meteorites containing phosphorus minerals landed in hot, acidic pools of liquids around volcanoes, which were likely to have been common across the early Earth.
'Rosetta Stone' For Tropical Ice Cores Discovered: Two annually dated ice cores drawn from the tropical Peruvian Andes reveal Earth's climate history in unprecedented detail - year by year, for nearly 1,800 years.
How Life May Have First Emerged On Earth: New research has yielded data supporting the idea that 10 amino acids believed to exist on Earth around 4 billion years ago were capable of forming foldable proteins in a high-salt (halophile) environment. Such proteins would have been capable of providing metabolic activity for the first living organisms to emerge on Earth between 3.5 and 3.9 billion years ago.
Io's Volcanoes Are In The Wrong Place: Jupiter's moon Io is the most volcanically active world in the Solar System, with hundreds of volcanoes, some erupting lava fountains up to 250 miles high. However, concentrations of volcanic activity are significantly displaced from where they are expected to be based on models that predict how the moon's interior is heated.
Travels in Geology: Of all the famous fossil localities in the world, perhaps none is as widely celebrated as British Columbia’s ancient Burgess Shale. Visiting the Burgess Shale requires some preparation - but for a fossil enthusiast, the payoff is worth every step.
More Rocks in the News

Drilling Down Into The Deepwater Horizon Disaster
What Happens When British Petroleum Executives Spill Coffee
What Happens When British Petroleum Funds Congressional Election Campaigns
Why This Is Going To Happen Again...

Letters to the Editor
Say NO to Akaka Governed Public Land: A bitter legislative battle is raging over collecting fossils on public lands.

Chambers Fit For A Queen - A Quest For English Ammonites
Rock&Gem Feature Article
More Rock&Gem Online Features:
Anyone Can Carve
A Day in the Life of a Gemologist
Into the Caves - "California's Underground" at the Oakland, California Museum
Bingham Canyon Copper - Finding Chalcopyrite at "The Richest Hole on Earth"
Rockhound in Greece - A Great Destination for Geology... and Humanity
Honoring Mr. Jones - Our Senior Editor Gets What He Deserves
Faceting Fascinates - With an Experienced Guide, You, Too, Can Bring Gemstones to Life!
Tonopah and Goldfield - They Were the Hub of Nevada's Gold Rush
Agates from the Land of Pumas and Craters
Mexico's Mystery Stone
A Lesson in Channel Work
New England Pegmatites: They Have Been Mined Since America's Earliest Days
Turquoise: Blue Sky...Blue Stone
Faceting by Hand: Jack Lahr's Lap-Lap Relies on Primitive Power

Rock&Gem Magazine Article Search
Search Back Issues for Articles with Topics of Interest
Rock&Gem Writer's Guidelines

Rock&Gem Magazine Show Calendar
An Extensive List of Upcoming Gem and Mineral Shows
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Win and Rock&Gem Magazine will Feature Your Work and Throw in a Dremel Tool to Boot
Entry Details - Browse the Current and Prior Contest Winners

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Software for Rockhounds
Mineral Database and Identification Software: Photo Atlas of Minerals - Lithos - MinSearch - MDI Mineral Database - Geolib - Topaz - Minrls - Digital Rockhound's Companion
Freeware Screen Savers for Rockhounds: Tucson Show V2001 - Grand Hikes - Minerals V1.0
Freeware Faceters Companion CD!: Featuring Over 250 Faceting Patterns
GemCad: Gemstone Design Software
Ososoft Mineral Label: Freeware Specimen Labeling Software for Rock Collectors!
RockWare Freeware: Erupt - GeoTrig - Mineral Mastery - Seismic - Magnetic
Freeware Mars Map: High Resolution Orbiter Camera Global Mosaic

Rock Identification Key
A Beginner's Guide and Key to Help You Identify and Put a Name on That Rock!
Learn to ID and Distinguish Basalt, Diabase, Diorite, Gabbro, Granite, Obsidian, Pumice, Rhyolite, Scoria, Gneiss, Marble, Quartzite, Schist, Serpentinite, Slate, Breccia, Conglomerate, Limestone, Sandstone, Shale...

Mineral Identification Key
An Online Guide and Key to Aid in the Identification of Field Collected Mineral Specimens
Covering Several Hundred of the Most Commonly Occurring and Collected Species

Crystallography and Mineral Crystal Systems
An Illustrated, Nine-Part Primer on Crystallography and Mineral Crystal Systems

Mineral Nomenclature: Naming New Minerals
So You've Discovered a New Mineral and Want to Name It "Spottite" After Your Dog...

Changes In Mineralogical Nomenclature: Varieties
Why Rock Scientists Won't Understand the Question When You Ask "What mineral is amethyst a variety of"?

Grand Hikes
A Virtual Tour and Rockhound's Hiking Guide for the Grand Canyon
Stromatolite Fossils in the Hakatai Shale - A Day Hike from Phantom Ranch
Comanche Point Vicinity - An Overnight Hike to Spectacular Grand Canyon Supergroup Views
Genesis V2.0 - God's Grand Work Week - A Grand Canyon Geology Primer
The 1869 Expedition - An Account of the First Grand Canyon Float Trip
Grand Hikes Screen Saver V1.0 - A Complimentary Grand Canyon Screen Saver
Bob's Grand Canyon Backcountry Equipment Checklist - Don't Leave Home Without It!

Alcyone
A Faceted Gemstone Design for CZ Inspired by the Pleiadians - Designed by Bob Keller

Perfect Transfer
Interested in Faceting? Check Out this Feature for Faceters!
Featured Cut: Defibrillator I - A Heart for Your Sweetheart
Gateway to Gemstone Designs on the Internet - Download Over 300 Faceting Diagrams with Cutting Instructions!
Browse and Download the Freeware Faceters Companion CD
Currently Featured Article: A Graphical Presentation of Brightness in the Standard Round Brilliant
Index of Online Faceting Articles - Faceting How-to and Tips from Many Facetors and Gemstone Designers!
Online Tangent Ratio and Gem Weight Calculators
Content and Information for Faceters

Defibrillator I

Manuals for Vintage Lapidary Equipment
Need the manufacturer's manual for your estate sale find?

Greetings from Tucson
Our Shows, Museums, Clubs, Rock Shops, and Other Attractors

Snapshots from the Tucson 2007 Gem and Mineral Show

Tucson Gem and Mineral Show Reports
Browse the Tucson Gem and Mineral Show with Bob!

How to Wirewrap
A Step-by-Step Pendant Design for Faceted Stones that Does Away With Claws

Sworn to Fun
A Club President's Perspective on the Decline of Rockhounding

Featured Articles by John Betts
Advice for Beginners
Anthony's Nose, New York
A Field Guide to Mineral Collectors  
Mineral Prices: Why so High?
Dealing with Dealers
Mineral Cleaning
Largest Mineral Crystals on Record
Display Lighting of Minerals

The Great Fresnoite Discovery of 1998
Scott's Big Score in California's San Benito Mountains

Rockhounding Graves Mountain
Collecting Rutile and Other Minerals at this Famous Georgia Locality

Collecting at the Bunker Hill Mine
Ron and Rose-Marie's Most Excellent Bunker Hill Mine Adventure

Gypsum Rosettes
Collecting at the Red River Floodway in Winnipeg, Canada

Micromounter's Mecca
A Visit to the Micromounter's Swap Room at the Tucson Gem and Mineral Show
Check Out Tim Jokela's The Top Ten Reasons to Get Into Micromounting

Anatomy of a Three-Headed Sphere Machine
Interested in Rolling Your Own?

Cabochon Making 101
Cabbing with Tucson's Old Pueblo Lapidary Club

Feldspar
An Introduction to the Feldspar Minerals by Anita D. Westlake

Purple Passion Prospect
Wulfenite Collecting near Wickenburg, Arizona

Rock and Fossil Stamps of the United States
A Preview Page of the Shop's Topical Stamp Catalog for Rockhounds

Gemstone Beads Galleries:   Agate Beads   Amethyst Beads   Apatite Beads   Aventurine Beads   Azurite/Malachite Beads   Blue Chalcedony Beads   Blue Lace Agate Beads   Bone Beads   Botswana Agate Beads   Carnelian Beads   Charoite Beads   Chrysoprase Beads   Copper Beads   Crazy Lace Agate Beads   Fiery Agate Beads   Fluorite Beads   Green Chalcedony Beads   Hypersthene Beads   Jasper Beads   Lapis Beads   Magnesite Beads   Malachite Beads   Moonstone Beads   Multi-Stone Beads   Pearl Beads   Petrified Wood Beads   Quartz Beads   Rhodochrosite Beads   Rose Quartz Beads   Ruby Beads   Rutilated Quartz Beads   Sagenite Agate Beads   Sapphire Beads   Sardonyx Beads   Seraphinite Beads   Spiderweb Serpentine Beads   Sunstone Beads   Tiger Eye Beads  
Turquoise Beads Galleries:   Graduated   Misc. Shapes   Nuggets   Rondelles   Rounds   Spiderweb Turquoise   Square and Rectangular  
Pendants Galleries:   Pendants  

Mineralogical Meanderings
The Hardness of Minerals and Rocks
Streaking Minerals - Streak Testing
Collecting Micrometeorites
Identifying True Amber
Some Surefire Signs You're a Rockhound
Collecting Rock Stamps
Gem and Mineral Phonecards
The Mysterious Power of Gemstones and Crystals

Bob's Rock Shop 1st WWW Specimen Image Contest Results!
Do You Take Pictures of Rocks? If So, You'll Appreciate These - Check Out the Winning Entries!
Winners competed for custom specimen mounting, mineral specimens, rockhound magazine and newsletter subscriptions, specimen labeling and mineral database software and more... These and other outstanding entries will also be featured in a new version of the Shop's ever popular freeware specimen image screen saver!

Black Matrix Stabilized Turquoise   Blue Green Stabilized Turquoise   Blue Ice Stabilized Turquoise   Cameo Stabilized Turquoise   Campitos Stabilized Turquoise   Campitos Azure Stabilized Turquoise   Chinese Stabilized Turquoise   Chinese Stabilized Spiderweb Turquoise   Cumpas Stabilized Turquoise   Mixed Stabilized Turquoise   Nacozari Stabilized Turquoise   Nevada Stabilized Turquoise   Red Skin Stabilized Turquoise   Sleeping Beauty Enhanced Turquoise   Sleeping Beauty Natural Turquoise   Sleeping Beauty Stabilized Turquoise   Turquoise Preforms  

Book and CD Reports
Dana's New Mineralogy, Eighth Edition
Encyclopedia of Mineral Names, Special Publication 1 of The Canadian Mineralogist

Gallery of Mineral Specimen Images
George Campbell
Ken Colosky
Martin Friedlander
Bob Keller
David Michaels
D.E. Russell
Tim Schmanski
Stuart Wilensky
Wayne State University
Ron Zeilstra

Cut Rocks
Rock Knives by Stephen Hill
Sections from Brian Isfeld
Sections
Slabs and Cabs


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Arizona Mineral Company
Cutting Rocks
DesignerStones.com
John Betts Fine Minerals
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Extinctions Fossils
FacetingAccessories.com
FacetingRough.com
Gemart Services
GreatCabochons.com
GreatRough.com
GreatSlabs.com
LapidaryMachines.com
The Mineralogical Record Magazine
PrettyRock
Rock of Ages
RockTumbler.com
Rocks and Minerals Magazine
RockWare Earth Science Software
Shannon & Son's Minerals
Simkev Micromounts
The Sunnywood Collection
TumblingMachines.com
TurquoiseBeads.com
TurquoiseRough.com
Tysons' Fine Minerals
UC Minerals
UVTools
Dan Weinrich Fine Minerals
Wilensky Mineral Video
Wright's Rock Shop

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Bob Keller