Friday, January 13, 2017

January News

February 14 is our next Rock Club meeting.

(Please note that the March meeting will be on the FIRST Tuesday in March. March 7th @ 7:00 pm)

February is an open group discussion, hands on meeting.

Have you ever touched or held a 70 million year of rippled slab, a 100 million year old slab from the Grand Canyon area, a 70 million year old green turtle shell, a 25 to 75 million year old fern fossil, 100 million year old salt crystals in sandstone or a piece of the crust of the earth? These and so much more will be at our January meeting. You might be the new owner of a piece of our earth!! 

Members Only Rock Sale

Our Club Member Rock Sale will be on Tuesday, February 14, noon to 4.

Yes, this is the same day as our general meeting. I hope this makes it more convenient for those members who drive into Eugene / Springfield. Call Trish if you have any questions 541-517-3617 

Club Name Tag

We are now recognizing members that wear their club name tag or club patch to our general meetings. (preferably name tag) As a little incentive, we will have a drawing at each monthly meeting.  To have your name entered all you have to do is wear your name tag or club patch. Thank you Dean for this great idea! 

Dues! Dues! Dues!

Dues need to be paid for 2017! If your dues are not paid yet then they are past due. You can pay at our Jan 10th meeting or Mail to Springfield Thunderegg Rock Club P. O. Box 312 Springfield OR 97477. Dues are $14 for individuals and $20 for families. Please add $1 to dues for each junior member participating in Future Rockhounds of America program which starts in January. 


Our Rock Show is fast approaching.

Mark your Calendar March 11th, 9:00 - 5:00 and March 12th, 2017 10:00 - 3:00

If you are a club member and want to rent a table please bring the vendor contract and payment to our January meeting. Table availability is on a first come basis. Prefer to mail: Springfield Thunderegg Rock Club P. O. Box 312 Springfield OR 97477  If you need a contract contact Trish. Be thinking about what you can do to contribute to this years rock show & where you would enjoy working a shift. Every member is being asked to donate rock and/or related items for the silent auction.

Field Trip Planning

The field trip committee will have a planning meeting on January 14 @ 2:00 PM.   This meeting will be held at Bea's home. Any club member is welcome to attend.  For directions or more info contact Trish.



Thursday, January 12, 2017


We are rockhounds, members of The Springfield Thunderegg Rock Club who get much enjoyment out of our healthy, outdoors hobby of rock collecting.  We also support each other in learning the skills of polishing and faceting the treasures we find.

Interested in becoming a member?
Contact  Trish

We welcome new members to our club.

Tuesday, December 27, 2016

Current Club information


Trish Adams President / Editor / Show Director
Rick Faber Vice President / Welcome Chairperson 
Dean Burkhart Secretary / Treasurer 
Nadine Chapin Sergeant of Arms / 50-50 / Membership

Wayne Werder       Trustee / Field Trip / Greeter / Lapidary Class
Pat Hagner          Trustee
Gary Nelson       Trustee

Karen Burkhart     Co-Show Director         
Bea Allen           Field Trip         
Tom Hooker       Field Trip / Show Case Director     
Carma Schumann      Door Prize Chairman      
Heather Woodsum       Field Trip / Future Rockhounds Director     

Ken and Dixie Schaafsma       Field Trip     


Thursday, December 1, 2016


The Many Shades of Obsidian
Obsidian is a naturally occurring, volcanic glass, the result of rapid cooling during it formation.
Bright & shiny when simply lying on the ground in it natural state, obsidian is hard to ignore. Anyone who spends time hunting for an Indian artifact is apt to come upon obsidian arrowheads.
With its lovely luster, reasonable hardness and abundance in the permanently chic color of black, obsidian is also a fine addition to the jewelry maker’s stone palette.
Not all obsidians are just some shade of black.A few are surprisingly patterned or colorful as well.Did you know that there’s a group of Italian islands that produce black obsidian flecked with white“blooms” that look like Oregon’s and Utah’s famous “flowering” or “snowflake”?Or that the “snowflakes” are a result of the obsidian’s gradual transformation into a crystalline rock?You might of know that but I bet your friends or customers won’t.

Alamasite also called peanut obsidian is sprinkled with 3-8mm diameter red “jaspery” little spheres set in a background of dark gray to black, somewhat perlitic.
Well known to gardeners as a soil conditioner and to builders as an insulator, perlite is gray obsidian characterized by concentric banding and innumerable concentric cracks. It is found locally in Alamos, Sonora Mexico.

Apache tears: One of the best known varieties of obsidian.Apache tears are small, residual nodules of transparent to translucent black obsidian weathered out of massive perlite.The most famous and popular locality is at Superior, Arizona.Apache tears can also be found in Rome, Oregon. In Rome Oregon you can see the tears pretty easily lying on top of the white perlite ground cover.

Double flow obsidian:So called by Oregon and California rockhounds because of the exceptionally
twisted and convoluted “flow lines” in the material. The earliest use of this term was found in early lapidary
business in Oregon around 1941. These slabs were offered in 2x3 inch pieces for about fifty cents each.

Fire obsidian:Fire obsidian shows vibrant interference colors on very thin, twisting bands, which may be the result of flow patterns before the material cooled.The best pieces are superb gemstones suitable for fine jewelry.
This type of obsidian presumably comes from the Glass Butte area in Oregon.We (certain club members) still have not been so lucky to find it.

Flame obsidian:Flame obsidian, like fire obsidian, has dramatic iridescent colors.This is a hard to find type obsidian, but some specimens have been found at Richardson’s Rock Ranch, formerly The Priday Ranch. I’ve been up to the ranch mines, but have not seen much obsidian.Has anyone else?

Mahogany obsidian:
An attractive reddish-brown variety. It apparently owes its attractive mahogany color to the oxidation of finely dispersed iron minerals, such as magnetite.This type is found at Glass Butt Oregon and Davis Creek California.
The club has been to both places and it is quite easy to find just lying on the ground.

Rainbow obsidian:Rainbow shows its spectral colors dramatically in the black obsidian.The colors apparently arise from interference effects stemming form the alignment of very tiny rods of the mineral hedenbergite. This type of obsidian is found at Glass Butt Oregon, but we (the club) like to go to the Davis Creek area in California for large specimens.

Snowflake obsidian:Also called flower or flowering obsidian, this high-contrast patterned material has been exploited as a gem since the mid 20th century.It is characterized by very small white spheres from a few millimeters or less to perhaps two centimeters across. The white snowflakes, often identified as cristobalite, a high-temp form of silica, are the results of the obsidian devitrifying or rearranging itself into a more orderly material than a glass: alkali feldspar is also an important component.

We all know there are lots of different names for obsidian.Not all are listed here but the ones that are listed are the most popular. Silver-lace or pink types of obsidian that we (the club) all know from the Glass Butt area, but there are still more. If you have a good spot that you have found gem worthy obsidian please let us all know.
(Lapidary Journal July 2010)

Saturday, April 27, 2013

   Our Club trip to Murray Mountain
April 27.2013

Tom Hooker, President
I know I will find the big one.


Bill Mayer I gonna dig till I find the big one.

Craig Ivei: I know somethings

Trish Adams & Darlyn Ivie
Hey over here!! Look at this one.

Bill Mayer I gonna dig till I find the big one