A Microstructural Study of Pietersite from Namibia and China
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Download PDF About Minerals Sorted by Mineral Name
MINERALS SORTED BY NAME Here is an alphabetical list of minerals discussed on this site. More information on and photographs of these minerals in Kentucky is available in the book “Rocks and Minerals of Kentucky” (Anderson, 1994). APATITE Crystal system: hexagonal. Fracture: conchoidal. Color: red, brown, white. Hardness: 5.0. Luster: opaque or semitransparent. Specific gravity: 3.1. Apatite, also called cellophane, occurs in peridotites in eastern and western Kentucky. A microcrystalline variety of collophane found in northern Woodford County is dark reddish brown, porous, and occurs in phosphatic beds, lenses, and nodules in the Tanglewood Member of the Lexington Limestone. Some fossils in the Tanglewood Member are coated with phosphate. Beds are generally very thin, but occasionally several feet thick. The Woodford County phosphate beds were mined during the early 1900s near Wallace, Ky. BARITE Crystal system: orthorhombic. Cleavage: often in groups of platy or tabular crystals. Color: usually white, but may be light shades of blue, brown, yellow, or red. Hardness: 3.0 to 3.5. Streak: white. Luster: vitreous to pearly. Specific gravity: 4.5. Tenacity: brittle. Uses: in heavy muds in oil-well drilling, to increase brilliance in the glass-making industry, as filler for paper, cosmetics, textiles, linoleum, rubber goods, paints. Barite generally occurs in a white massive variety (often appearing earthy when weathered), although some clear to bluish, bladed barite crystals have been observed in several vein deposits in central Kentucky, and commonly occurs as a solid solution series with celestite where barium and strontium can substitute for each other. Various nodular zones have been observed in Silurian–Devonian rocks in east-central Kentucky. -
Tiger's Eye Is Not a Pseudomorph Glenn Morita in the Early 1800’S, Mineralogists Recognized That Tiger’S Eye Was a Fibrous Variey of Quartz
Minutes of the 05/20/03 Westside Board Meeting VP Stu Earnst opened the meeting at 7:31pm. Treasurer’s report read by Kathy Earnst. Minutes approved as published in the newsletter. Old business: Lease on Walker valley discussed. The expiration notice was sent but we are not sure who it went to. We do not see any obstacle to renewal as communication between the council and DNR are open and ongoing. Special thanks, to DNR representative, Laurie Bergvall and DNR staff for their time and effort in hearing our concerns and working towards mutually beneficial solutions on the Walker Valley issues. Sign production is on hold until the sign committee decides where and what the signs will say. We have decided that they will not be on the gate but separate from it. There will be a gate going up at Walker Valley but we will have access to that lock and it will probably be a combo type of thing that we can easily give to other rockhound clubs going there. Talked about the possibility of posing the combo on website but that will depend on the type of gate they put up and what ends up being possible with the mechanics of that gate. New business: Thank you from Bob Pattie and Ed Lehman to Bruce Himko and AAA Printing for donation of the paper. Thank you to Danny Vandenberg for providing sample Walker Valley Material to DNR to show the value of the material we are trying to preserve and enjoy. Bob Pattie is pursuing with the retrieval of our state seized funds through the unclaimed property process. -
City of St. Peters Board of Aldermen Tentative Agenda for Regular Meeting St
CITY OF ST. PETERS BOARD OF ALDERMEN TENTATIVE AGENDA FOR REGULAR MEETING ST. PETERS JUSTICE CENTER, 1020 GRAND TETON DRIVE, ST. PETERS, MO 63376 OCTOBER 22, 2020 – 6:30 P.M. A. Call to Order, Mayor Len Pagano B. Roll Call C. Opening Ceremonies 1. Invocation 2. Pledge of Allegiance 3. Proclamations: National Arts and Humanities Month, Jill Tutt 4. Presentation: No Hunger Holiday, Mike Narkawicz 5. Recognition: Random Acts of Kindness D. Approval of Minutes: The Board of Aldermen Work Session meeting of October 8, 2020; and the Regular Board of Aldermen meeting of October 8, 2020. E. Reports of Officers, Boards and Commissions 1. Mayoral Report of Appointments to Boards and Commissions a. Appointment to the Veterans Memorial Commission 2. City Administrator’s Report: 3. Report of Director, Planning, Community and Economic Development: 4. St. Peters Business Spotlight: None F. Open Forum 1. Citizens Petitions and Comments 2. Communications from the Elected Officials 3. Announcements G. Public Hearings: None H. Unfinished Business Items: None I. New Business Items: 1. Bill No. 20-118: Bill authorizing the City Administrator of the City of St. Peters, Missouri, to execute a Certain Subrecipient Agreement between St. Charles County (Grantee) and the City of St. Peters (Subrecipient) for conducting City Community Development Block Grant (CDBG) Programs with 2020 Federal Funding 2. Bill No. 20-119: Bill of the City of St. Peters, Missouri, deleting Chapter 615 of the Code of the City of St. Peters, Missouri, in its entirety; enacting, in lieu thereof, a new Chapter 615; and providing for the licensing and regulation of body art establishments and body artists 3. -
Symposium on Agate and Cryptocrystalline Quartz
Symposium on Agate and Cryptocrystalline Quartz September 10 – 13, 2005 Golden, Colorado Sponsored by Friends of Mineralogy, Colorado Chapter; Colorado School of Mines Geology Museum; and U.S. Geological Survey 2 Cover Photos {top left} Fortification agate, Hinsdale County, Colorado, collection of the Geology Museum, Colorado School of Mines. Coloration of alternating concentric bands is due to infiltration of Fe with groundwater into the porous chalcedony layers, leaving the impermeable chalcedony bands uncolored (white): ground water was introduced via the symmetric fractures, evidenced by darker brown hues along the orthogonal lines. Specimen about 4 inches across; photo Dan Kile. {lower left} Photomicrograph showing, in crossed-polarized light, a rhyolite thunder egg shell (lower left) a fibrous phase of silica, opal-CTLS (appearing as a layer of tan fibers bordering the rhyolite cavity wall), and spherulitic and radiating fibrous forms of chalcedony. Field of view approximately 4.8 mm high; photo Dan Kile. {center right} Photomicrograph of the same field of view, but with a 1 λ (first-order red) waveplate inserted to illustrate the length-fast nature of the chalcedony (yellow-orange) and the length-slow character of the opal CTLS (blue). Field of view about 4.8 mm high; photo Dan Kile. Copyright of articles and photographs is retained by authors and Friends of Mineralogy, Colorado Chapter; reproduction by electronic or other means without permission is prohibited 3 Symposium on Agate and Cryptocrystalline Quartz Program and Abstracts September 10 – 13, 2005 Editors Daniel Kile Thomas Michalski Peter Modreski Held at Green Center, Colorado School of Mines Golden, Colorado Sponsored by Friends of Mineralogy, Colorado Chapter Colorado School of Mines Geology Museum U.S. -
AMETHYSTINE CHALCEDONY by James E
NOTES ANDa NEW TECHNIQUES AMETHYSTINE CHALCEDONY By James E. Shigley and John I. Koivula A new amethystine chalcedony has been discovered in that this is one of the few reported occurrences Arizona. The material, marketed under the trade name where an amethyst-like, or amethystine, chalced- "Damsonite," is excellent for both jewelry and carv- ony has been found in quantities of gemological ings. The authors describe thegemological properties of importance (see Frondel, 1962). Popular gem this new type of chalcedony, and report the effects of hunters' guides, such as MacFall (1975) and heat treatment on it. Although this purple material is Anthony et al. (19821, describe minor occurrences apparently b.new color type of chalcedony, it has the same gemological properties as the other better-known in Arizona of banded purple agate, but give no types. It corresponds to a microcrystalline form of ame- indication of deposits of massive purple chalced- thyst which, when heat treated at approximately ony similar to that described here. This article 500°C becomes yellowish orange, as does some briefly summarizes the occurrence, gemological single-crystal amethyst. properties, and reaction to heat treatment of this material. LOCALITY AND OCCURRENCE The purple chalcedony described here has been Chalcedony is a microcrystalline form of quartz found at a single undisclosed locality in central that occurs in a wide variety of patterns and colors. Arizona. It was first noted as detrital fragments in Numerous types of chalcedony, such as chryso- the bed of a dry wash that cuts through a series of prase, onyx, carnelian, agate, and others, have been sedimentary rocks. -
Origin of Fibrosity and Banding in Agates from Flood Basalts: American Journal of Science, V
Agates: a literature review and Electron Backscatter Diffraction study of Lake Superior agates Timothy J. Beaster Senior Integrative Exercise March 9, 2005 Submitted in partial fulfillment of the requirements for a Bachelor of Arts degree from Carleton College, Northfield, Minnesota. 2 Table of Contents AGATES: A LITERATURE REVEW………………………………………...……..3 Introduction………………....………………………………………………….4 Structural and compositional description of agates………………..………..6 Some problems concerning agate genesis………………………..…………..11 Silica Sources…………………………………………..………………11 Method of Deposition………………………………………………….13 Temperature of Formation…………………………………………….16 Age of Agates…………………………………………………………..17 LAKE SUPERIOR AGATES: AN ELECTRON BACKSCATTER DIFFRACTION (EBSD) ANALYSIS …………………………………………………………………..19 Abstract………………………………………………………………………...19 Introduction……………………………………………………………………19 Geologic setting………………………………………………………………...20 Methods……………………………………………………...…………………20 Results………………………………………………………….………………22 Discussion………………………………………………………………………26 Conclusions………………………………………………….…………………26 Acknowledgments……………………………………………………..………………28 References………………………………………………………………..……………28 3 Agates: a literature review and Electron Backscatter Diffraction study of Lake Superior agates Timothy J. Beaster Carleton College Senior Integrative Exercise March 9, 2005 Advisor: Cam Davidson 4 AGATES: A LITERATURE REVEW Introduction Agates, valued as semiprecious gemstones for their colorful, intricate banding, (Fig.1) are microcrystalline quartz nodules found in veins and cavities -
Wire Groove-Wrapping a Stone
WIRE GROOVE-WRAPPING A STONE By Garry Mahan How to turn your cabochons into simple, yet elegant pieces of jewelry Tools and materials used in this tutorial Grooving machine is Gold-filled wire Hobby Vise shown on next page 20 GA round, half- hard 21 GA half-round, half- hard Quilter’s rotary cutting mat 1/4” wooden dowel Plastic-coated needle- Wire cutters Uncoated needle- nose pliers nose pliers This is a grooving machine. It is a Gryphon Gryphette. It was originally designed to put the grooves in glass when working stained glass. This machine was purchased from eBay. Machine, 2 grooving grind- ers, and shipping costs totaled about $100. Grooving machine This is the grooving cutter/grinder currently mounted on the Gryphon Gryphette machine shown on previous photo. Diamond coating on edge of cutter/grinder Set screw You’re ready to start making your pendant. The first thing to do is select a stone. Pick a good quality cabo- chon. The purpose of wire wrapping is to showcase the stone, not necessarily the wire. A quality stone wrap always begins with a quality stone. This stone is dendritic jasper from Burro Creek, AZ. Use a soft touch. Hold stone with flat side down and turn on grooving machine to make the groove. It is best to make 4 to 6 passes around the stone to prevent chipping and prevent diamond from “wiping” off the diamond-coated grinding wheel. Woof! Putting the groove in the cabochon Measure the distance around your cab and cut a length of round 20 GA gold- filled wire. -
Common Fossils, Rocks and Minerals in Scotland
Geology ish .c ott o Sc m C Common Fossils, Rocks and o d lle n cti la ng in Scot Minerals in Scotland Scotland is extremely lucky as it has many different types of fossils, minerals and rocks. It is possible to find and collect rock, fossil and mineral specimens provided it is done in a responsible manner and the Geological Fieldwork Code is followed. In time the Scottish Fossil Code will provide detailed information on the collection and care of fossils in Scotland (both codes can be found on www.ScottishGeology.com). The following pages list some of the more commonly found geological specimens. In museums and books, we often see only the best examples. Here, we have chosen not to photograph such specimens, but instead have chosen examples which are more likely to be found. The pictures here have a pencil for scale. Words in bold type will be explained, and you’ll find a geological timescale at the end to explain words shown in blue. The Fieldwork Code - the most important bits... Remember the Country Code and observe local bylaws - shut gates and leave no litter Look for loose material to collect first, to avoid hammering at all Don't hammer indiscriminately and remember you don't always need to take a sample Keep collecting to a minimum; leave material left for other people to enjoy If you find anything interesting, tell the local museum. Always make a note/take a photo of where you found it Try to leave sites as you find them Always wear protective goggles when hammering and be aware of where other people are around you Make sure you don't get cut off by the tides 1 Fossils - Animals with Backbones Animals with backbones, for example fish, dogs, and humans are grouped together and called vertebrates. -
Welcome to Billings, Montana July 30-August 2, 2009 I Would Like To
Welcome to Billings, Montana July 30-August 2, 2009 I would like to take a few minutes to welcome you to the AFMS/NFMS Show and Convention. There will be a number of special exhibits designed to make this a show you won’t forget for many years. Come join us and enjoy seeing the Moon Rock from NASA, a life sized Cave Bear, Dinosaurs, a world class Ruby Collection, a rare Yogo Sapphire Collection, a Polar Bear carving (4ft high, weighing 2000 lbs) and much more, as we are adding things everyday. We also look forward to seeing your special exhibits, so please take some time and think about what showcases you would like to enter, and also your collection or your craftsmanship that would make a great competition exhibit. Let’s show the country what the Northwest has to offer. We hope you plan your vacation around this show, and visit the many wonders that Montana has to offer: Yellowstone National Park, Glacier National Park, the Dinosaur Trail including Makoshika State Park, Little Big Horn Battle Field, where General Custer fought, Pompeys Pillar, and lots more, plus great areas for boating, fishing, camping and hiking. Plan on spending the entire week after the show taking advantage of our planned field trips collecting Montana Agate, Jasper, Petrified Wood, Bear Canyon fortification agate, a variety of fossils such ammonites, nautiloids, pine cones, stramatolites, crinoids, coral and others. There will also be a guided Geological Tour of the Pryor Mountains, a guided tour of the Stillwater mine smelter and several self guided tours for quartz crystals, opal and Montana sapphires. -
Spring 1995 Gems & Gemology
TABLE CONTENTS FEATURE ARTICLES 2 Rubies from Mong Hsu Adolf Pelsetti, I(ar7 Schmetzer, Heinz-Jiirgen Bernhardt, and Fred Mouawad " 28 The Yogo Sapphire Deposit Keith A. ~~chaluk NOTES AND NEW TECHNIQUES 42 Meerschaum from Eskisehir Province, Turkey I<adir Sariiz and Islcender Isilc REGULAR FEATURES 52 Gem Trade Lab Notes Gem News Most Valuable Article Award Gems ed Gemology Challenge Book Reviews Gemological Abstracts Guidelines for Authors ABOUT THE COVER: One of the most important ruby localities of the 1990s cov- ers a broad orea near the town of Mong Hsu, in northeastern Myann~ar(B~lrrna). The distinctive gemological features of these rubies are detailed in this issue's lead article. The suite of fine jewelry illustraled here contains 36 Mong Hsu rubies with a total weigh1 of 65.90 ct; the two rubies in the ring total 5.23 ct. jewelry courtesy of Mouawad jewellers. Photo by Opass Sultsumboon-Opass Suksuniboon Studio, Bangltolz, Thailand. Typesetting for Gerrls eS Gemology is by Graphix Express, Santa Monica, CA. Color separations are by Effective Graphics, Compton, CA. Printing is by Cadmus lournal Services, Easton, MD. 0 1995 Gemological Institute of America All rights reserved ISSN 0016-626X - Editor-in-Chief Editor Editors, Gem Trade Lab Notes Richard T. Lidtlicoat Alicc S. I<cller Robcrt C. I<ammerling 1660 Stewart St. C. W. Fryer Associate Editors Smta Mon~ca,CA 90404 William E. Boyajian Editors, Gem News (800)421-7250 ~251 Robcrt C. Kamn~erling Rohcrt C. I<ammerling e-mail: altellcrBclass.org D. Vincent Manson John I. Koivula John Sinltanltas Sr~bscriptions Enirnanuel Fritsch Jln Ll~n Editors, Book llevielvs Technical Editor (800) 421-7250 x201 Susan B. -
Healing Gemstones for Everyday Use
GUIDE TO THE WORLD’S TOP 20 MOST EFFECTIVE HEALING GEMSTONES FOR EVERYDAY USE BY ISABELLE MORTON Guide to the World’s Top 20 Most Effective Healing Gemstones for Everyday Use Copyright © 2019 by Isabelle Morton Photography by Ryan Morton, Isabelle Morton Cover photo by Jeff Skeirik All rights reserved. Published by The Gemstone Therapy Institute P.O. Box 4065 Manchester, Connecticut 06045 U.S.A. www.GemstoneTherapyInstitute.org IMPORTANT NOTICE This book is designed to provide information for purposes of reference and guidance and to accompany, not replace, the services of a qualified health care practitioner or physician. It is not the intent of the author or publisher to prescribe any substance or method to cure, mitigate, treat, or prevent any disease. In the event that you use this information with or without seeking medical attention, the author and publisher shall not be liable or otherwise responsible for any loss, damage, or injury directly or indirectly caused by or arising out of the information contained herein. CONTENTS Gemstones for Physical Healing Light Green Aventurine 5 Dark Green Aventurine 11 Malachite 17 Tree Agate 23 Gemstones for Emotional Healing Rhodonite 30 Morganite 36 Pink Chalcedony 43 Rose Quartz 49 Gemstones for Healing Memory, Patterns, & Habits Opalite 56 Leopardskin Jasper 62 Golden Beryl 68 Rhodocrosite 74 Gemstones for Healing the Mental Body Sodalite 81 Blue Lace Agate 87 Lapis Lazuli 93 Lavender Quartz 99 Gemstones to Nourish Your Spirit Amethyst 106 Clear Quartz / Frosted Quartz 112 Mother of Pearl 118 Gemstones For Physical Healing LIGHT GREEN AVENTURINE DARK GREEN AVENTURINE MALACHITE TREE AGATE https://GemstoneTherapyInstitute.org LIGHT GREEN AVENTURINE 5 Copyright © 2019 Isabelle Morton. -
Agate Structures 3: Orbicular...Agate?
Speaking of Agates and God, and Man - Agate Structures, Part 3 ©2015 Bill Kitchens Agate Structures 3: Orbicular...Agate? Thought I was going to say 'Jasper' didn't you? We usually think of jaspers when we think of orbicular structures, and the vast majority of orbicular materials are called 'jaspers'. If one surveys the whole array of orbicular material, including low end material, the majority may well be orbicular 'bird's eye' rhyolites. Some of the rhyolites are silicified and could be properly called jaspers. But some rocks called jaspers could better be called agates. The highest grade of the very popular gem stone from Madagascar called 'Ocean Jasper' is generally considered to be an agate, although some agate purists might classify it as an orbicular quartz. I have put consideration of orbicular agate far down in this study of agate although I gave thought to putting it first. Remember my mentioning seeing a definition of chalcedony as "fibrous spherical silica" ? Some of the visible characteristics of orbicular agate give us windows into what might occur on the micro and sub- microscopic scales in all agate. Take a look at the close-up photo, below, of cheery Ocean Jasper orbs. They consist, as far as I can tell from visual observation, of spherules of...well, let's wait on that, surrounded by bladed green quartz and banded chalcedony. Ocean Jasper, Madagascar Speaking of Agates and God, and Man - Agate Structures, Part 3 ©2015 Bill Kitchens Now, let's look at a macro-photo of another Ocean Jasper. This one allows us a look into a small cavity where long ago a moment was frozen in time.