ISBN:
1591932394
Title: Michigan Rocks & Minerals Pdf A Field Guide to the Great Lake State (Rocks & Minerals Identification Guides)
Author: Dan R. Lynch
Published Date: 2010
Page: 256
Dan R. Lynch has a degree in graphic design with emphasis on photography from the University of Minnesota Duluth. But before his love of the arts came a passion for rocks and minerals, developed during his lifetime growing up in his parents’ rock shop in Two Harbors, Minnesota. Combining the two aspects of his life seemed a natural choice and he enjoys researching, writing about, and taking photographs of rocks and minerals. Working with his father, Bob Lynch, a respected veteran of Lake Superior’s agate-collecting community, Dan spearheads their series of rock and mineral field guides―definitive guidebooks that help amateurs “decode” the complexities of geology and mineralogy. He also takes special care to ensure that his photographs compliment the text and always represent each rock or mineral exactly as it appears in person. He currently works as a writer and photographer in Madison, Wisconsin, with his beautiful wife, Julie. Bob Lynch is a lapidary and jeweler living and working in Two Harbors, Minnesota. He has been cutting and polishing rocks and minerals since 1973, when he desired more variation in gemstones for his work with jewelry. When he moved from Douglas, Arizona, to Two Harbors in 1982, his eyes were opened to Lake Superior’s entirely new world of minerals. In 1992, Bob and his wife Nancy, whom he taught the art of jewelry making, acquired Agate City Rock Shop, a family business founded by Nancy’s grandfather, Art Rafn, in 1962. Since the shop’s revitalization, Bob has made a name for himself as a highly acclaimed agate polisher and as an expert resource for curious collectors seeking advice. Now, the two jewelers keep Agate City Rocks and Gifts open year-round and are the leading source for Lake Superior agates, with more on display and for sale than any other shop in the country. Quartz Hardness: 7 Streak: White Environment: All environments What to look for: Light-colored and very hard crystals, veins, pockets, or pebbles Size: Quartz can be found in a large range of sizes; as masses larger than a basketball or crystal points smaller than a pea Color: Colorless to white, brown to red, purple Occurrence: Very common Notes: Quartz is the single most abundant mineral on the planet, so every rock collector, amateur or professional, should know both how to identify it and the forms it takes. Quartz consists of silicon and oxygen, otherwise known as silica, which is colorless or white when pure, but it can take on a rainbow of colors depending on impurities. Well-formed quartz crystals, commonly called “rock crystals,” are six-sided and are found in cavities within rock. Quartz also commonly fills vesicles (gas bubbles) and cracks within rocks, appearing as pockets or veins. Beach-worn quartz masses are found as translucent white, round pebbles. Quartz is also one of the primary ingredients in rhyolite and granite, which makes those rocks very hard and weather-resistant. The identifying features of quartz are very important to know. Aside from its very high hardness and six-sided crystal points, quartz has a glassy luster and conchoidal fracture, which means that when struck or broken, quartz cracks or breaks in a rounded, half-moon shape. All quartz-based minerals will exhibit this fracture. Finally, quartz will produce a spark when struck with a metal object. Where to Look: Quartz specimens are easily picked up on the Keweenaw’s lakeshore and in copper mine dumps.
Your Must-Have Guide to Michigan’s Rocks and Minerals
Get the perfect guide to rocks and minerals of the Great Lake State! This book by Dan R. Lynch and Bob Lynch features comprehensive entries for 96 Michigan rocks and minerals, from common rocks to rare finds. Learn from the fascinating information about everything from Petoskey stone and copper to gold and agates. The easy-to-use format means you’ll quickly find what you need to know and where to look. The authors’ incredible, sharp, full-color photographs depict the detail needed for identification―no need to guess from line drawings.
With this field guide in hand, identifying and collecting is fun and informative.
Great pictures This book is great for any rock enthusiast! Love rock hunting on Michigan beaches. Beautiful pictures. And cool that the book is pocket size. I keep it in my glove box. So I dont forget it.but feel like I need more of an education in geology to ... I am very much a novice when it comes to rock picking. This book has extensive information on the rocks and minerals of Michigan. I found that information somewhat helpful, but feel like I need more of an education in geology to fully appreciate it.Everyone that I showed this book to loved it! Highly recommended Everyone that I showed this book to loved it! Highly recommended. The color pictures are great. I especially appreciate that it gives more than one example of what each rock looks like.
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