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Rocks In My Head

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geology et al
some days are pretty good
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Rock Shop
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Mood:  energetic
Topic: some days are pretty good
I am going to put aside the book I was reading about Minnesota geology for a while and take up that study again when I get a more current text. Not that I regret reading this one. Just because Minnesota doesn't have a lot of gem material doesn't mean there isn't a lot to ponder. I love mysteries. A big one is, what's under all that glacial drift? Diamonds? Maybe something we can't even imagine.... But now I think I will scan the field guide to minerals for a while, and maybe later read a book about tektites.

I am thinking more about purchasing molds for making fossil replicas, and growing crystals.

Most "rockhounds" (there's that detestable word again) have a special field of interest. I guess I like odd things. Curiosities. Fossils, crystals, rocks used for tools by human beings. I am not completely turned off by the metaphysical aspects. Some beautiful objects have been made or discovered that satisfy the natural healer's needs. And sometimes I think it would be challenging to pound rocks and glass into little pieces and make mosaics.

But the average person (and I'm quite average) needs a grounding in the basics, and needs to review now and then. And so I open this book called Minerals of the World....

The first few chapters are about igneous, sedimentary and metamorphic rocks, crystal habits, atoms, and lunar rocks. I am more interested in keeping the nomenclature straight. It has always confused me.

The chemicals that occur in pure, uncombined form in the earth's crusts are called native elements. These are divided into three groups: metals, non-metals and semi-metals.

The metals considered in the book are gold, silver, copper, mercury, lead, platinum, tin and iron. The non-metals are carbon (both diamonds and graphite are forms of pure carbon) and sulfur. The semi-metals have properties between metal and non-metal and include antimony, arsenic and bismuth. Have you got that straight? I am considering what I have in my collection that falls into the native elements category. I sold my silver ore but I can get more...somewhere. I have gold and pyrite in a polished slab. Some copper ores. No platinum, plenty of iron but perhaps not the native iron except in one meteorite. I don't know where my mother's diamond ring went to but it might be around somewhere. It was small and not worth a lot of money. Sulfur crystals would be a fine addition to my collection, as would synthetic bismuth crystals (they're cool) and botryoidal arsenic. Time to get cracking if I want a comprehensive collection......

I went to a church meeting last night to propose a writers' workshop facilitated by a professional outsider. The idea was ok but there is no money for it except if the participants pay tuition. One person said he hated poetry. Somehow I have the feeling that even after the church loan is paid up, there won't be money for anything that "they" don't feel is important....

Hoffs Rock Shop

Posted by oh5/ojhoff at 9:16 PM CDT
Updated: 11/02/06 12:05 AM CST
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