The Rockytier
August 2017
Volume 29 Number 8
THE OFFICAL BULLETIN FOR THE LUBBOCK GEM & MINERAL SOCIETY

General Meeting:

Tuesday - August 1st, 2017
Meet- 7:00 pm
@ Forrest Heights United Methodist Church 3007 33rd St. Lubbock, Texas.

Business Meeting:
Tuesday - August 8th, 2017

 

JALAF:

We will not have a JALAF for the August meeting. Feel free to bring show and tell items!

August Birthstone: Peridot, Sardonyx, and Spinel
 
2017 Shows: 
August:
Baton Rouge Gem & Mineral Society, Annual Show 12th-13th
November: 
Nov 10 – 12, Humble, TX, Houston G&MS and SCFMS Convention, Humble Civic Center
Nov 18 – 19, Mesquite, TX, Dallas G&MS, Rodeo Center Exhibit Hall

From the President:
Hello everyone, Just a reminder that August is our Ice Cream Social, so in place of our regular meeting we will meet and eat!

Traditionally, members would bring their best homemade ice cream to compete for top honors but if you are like me, have not made ice cream for many years. If you don't make your own, bring your favorite store bought ice cream, toppings, drinks, or cake and cookies if you prefer. Bring enough for yourself, and a bit to share. 

Additionally, we will be having a silent auction with some really nice material and of course, we will welcome any show and tell that you bring as well.

Hope to see everyone there!
____
Walter Beneze, SCFMS President

What is a Peridot Bomb?

A peridot bomb is a rock encrusted with large nodular areas of peridot (gem-quality olivine). These crystals were formed deep in the earth’s crust and were carried to the surface by basaltic magma and gasses and ejected into the atmosphere during a volcanic eruption. A specimen can feature patches of translucent, yellow-green to dark olive peridot crystals, along with bright green diopside grains and black pyroxenes, covering a matrix of grey basalt.

Peridot, the birthstone for those born in August, is said to increase intuition, reduce stress, and stimulate personal growth.

 

Mamasminerals.com


Book Review, “A Guide to Fossil Colleting"
Don Shurtz, Pleasant Oaks Gem and Mineral Club of Dallas


“A Guide to Fossil Collecting” was written by “the Dallas Paleontological Society”. OK, it really was not the whole society, but the book does list 24 contributing authors with short biographies. The final version was edited by Dr. George Maxey, Ph.D. and Roger Farish. Many of the contributing authors are professionals in Geology and Paleontology, but some are true amateurs and hobbyists.

From an editing perspective, there are a few minor issues. In the introduction biographies, all the authors who have earned a doctorate (Ph.D.) should have the honorary title of Dr. listed with their name. Unfortunately, the honorary title was not listed for Dr. Bonnie Jacobs in the introduction to her biography, but fortunately, within the biography she is addressed as Dr. Jacobs. Also, in almost all technical writing formats (and a large portion of this book is of a technical nature), acronyms should be spelled out on their first use. As an example, the book refers to a CCC campground. As old as I am, I was not around in the days of the Civilian Conservation Corps (CCC), but I am old enough to have encountered many of their works and am familiar with what CCC means. I am guessing that most of the younger generations would either have to look up CCC on the internet or, more than likely, just give it a shrug and move on. I noted server occasions where only the acronyms were listed.

Now on to the good news. If you live or want to hunt fossils in the north Texas area, this is a “must have” book. The first half of the book is more a history of paleontology, the Dallas Paleontological Society, and the geology of North Texas with emphasis on the DFW area. The geology gets quite technical, but it builds a great foundation for the age of the rocks and the fossils we find. The last half of the book is more “hands on” with chapters on equipment needed, documenting a fossil’s location, excavation techniques (I sure would love to find a fossil that required excavation), fossil preparation (including techniques for removing some or all of the fossil from its matrix), displaying your fossil finds, and fossil photography, and concludes with a Field Trip Collecting Equipment Checklist. This checklist should probably be listed as a chapter in the book. However, it is shown in the table of contents as an addendum or something associated with the Documenting a Location chapter. The final part of the book includes a chapter on education and teaching paleontology in the general science programs in local schools, and chapter on dealing with museums and schools of higher education.

If you are a rockhound in DFW, you should know about fossils; they are the a lot more common that minerals and cutting material in this area. If you want to know about fossils, the book is a great starting point. Even if you know a little or a lot about fossils, this is an invaluable guide. The technical content is of the highest level, and the “hands-on” sections are very educational. I would highly recommend this book. My only wish – that the book were available in an electronic format. That would make it more portable, easier to search, and easier to update in the future.


from Pleasant Oaks Gem and Mineral Club of Dallas Newsletter May/June 2017

Notable Gems

 Huge Peridot Specimens


Peridot was originally called topazion after the island of Topazios (now Zabargad), an important source of the gem since ancient times. Eventually, the gem came to be named topaz. During the eighteenth century, for reasons that are not clear, the name topaz was re-assigned to the stone we call topaz today, and the name peridot was adopted for the stone represented here. Peridot is the gem variety of the mineral forsterite and is most prized when it is a medium-dark green without yellow or brown undertones. In early times, peridot was associated with the sun and was believed to possess medicinal powers. Peridot was used during the Crusades to adorn religious objects. It became popular in jewelry during the late 1800’s. Five continents are represented in this array of peridot gems: the peridot in the necklace is from Arizona; the other peridots are from Egypt, Burma, Pakistan, Antarctica, and Norway.

Shown Above:
Forsterite (var. peridot)NMNH G3705-00Myanmar [Burma] 286.6 ct
Forsterite (var. peridot)NMNH G3398-00Egypt 311.8 ct
Forsterite (var. peridot)NMNH G8964-00 122.66 ct
Forsterite (var. peridot)NMNH G7832-00 103.25 ct
Forsterite (var. peridot)NMNH G10060-00Pakistan 18.13 ct
Forsterite (var. peridot)NMNH G1925-00Arizona, United States 8.9 ct
Forsterite (var. peridot)NMNH G9982-00Norway 4.1 ct
Forsterite (var. peridot)NMNH G9712-00Trachtyte Hill, Antarctica 3.07 ct
Forsterite (var. peridot)NMNH G9919-00Arizona, United States 34.65 ct

http://geogallery.si.edu/index.php/10002808/peridot-gemstones

Submit stories, ideas, photos, or anything else you would like to see in the newsletter to 

editor@lubbockgemandmineral.org

 

The rules for the JALAF are:
Participants will remain beginners for one year from the month in which they enter their first piece in each category. At the end of one year the participant will be considered experienced in the categories they have entered. The JALAF master will attempt to keep records, but we will operate on an honor system as well.

We want to share and learn from the knowledge you acquired while finding, working or setting the piece, so please come prepared to tell us what you know (don’t worry if you don’t know what you have, hopefully someone can tell you)! The JALAF is open to Members, Juniors and Visitors.

We REALLY WANT and STRONGLY encourage ALL to bring pieces that fit the month’s theme, even if they are not eligible for entry because they do not meet the criteria or have previously won a feather. These pieces will be entered as display only, and will not be part of that month’s competition. PLEASE share your expertise and adventures with the rest of us.

Categories:
Cabochons
Jewelry
Fossils
Carvings
Specimens
Facet

Two levels in each category:
Experienced
Beginner

Criteria:
Specimens and Fossils: YOU must have found OR worked an otherwise acquired specimen.
Cabochons, Carvings and Facets: YOU must have created the piece yourself.
Jewelry: YOU must have created the setting OR worked the stone.

Since some months have more than one birthstone, we will be going by the American Gem Society list, found at:
https://www.americangemsociety.org/en/birthstones

Here is hoping everyone will compete and have fun!

Walter Beneze, LGMS President

See you at the next meeting!

Lubbock Gem & Mineral Society
Member of South Central Federation of Mineral Societies
Member of American Federation of Mineralogical Societie
s

 
THE ROCKYTIER is the official Bulletin of the Lubbock Gem and Mineral Society, Box 6371, Lubbock, TX. 79493. Meetings are held the first Tuesday of each month @ Forrest Heights United Methodist Church - 3007 33rd St. Lubbock, TX. at 7:00 p.m. unless announced otherwise. Annual dues are: $22.50 for adults, $10.00 for students 15 & up, $5.00 for students 6-15 and free for children under 6. Exchange editors are free to copy anything of interest from THE ROCKYTIER provided credit is given to the author of the article and THE ROCKYTIER.

The purpose of the Lubbock Gem and Mineral Society shall be:
(1) to bring about a closer association of those persons interested in the Earth Sciences and Lapidary Arts;
(2) to increase and disseminated knowledge about rocks, minerals, fossils and other geological materials;
(3) to encourage the study of rocks, minerals, fossils, artifacts, collecting and lapidary work and
(4) to conduct meetings, lectures, displays and field trips.


 
  ELECTED OFFICERS & DIRECTORS WHO ARE VOTING MEMBERS OF THE BOARD OF DIRECTORS
                     
    President     Walter Beneze (806)797-5832  
    Past President     Bobbie Horn (806) 786-9362  
    Vice President     Michael Zink (806) 451-0039  
    Secetary       Sabrina Krieger  (806) 891-0165  
    Treasurer     Charles Cockrell (806) 786-6895  
   
              Director (first year)
 
           Sabrina Krieger
(806) 891-0165  
   
         Director (second year)  
  Valerie Zink (806) 451-0038  
    Director (second year)