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Rockhounds information pages with subjects related to geology and mineral ID

Rock and Mineral Forum Guidelines

There are just a few rules here and yup I do enforce them and keep an eye on things as best I can. Here are a few guidelines I'd like you to follow if you will be participating here. This forum is not moderated as heavily as the other sections so please do not enter or open a topic if you think you will be offended. If you are at least respond like an adult or we will remove your post as soon as brought to our attention.

Vulgar and abusive language is not welcome here! Heck a cuss word to get a point across is not so bad, but I think you know what I mean.

I will not host public arguments and pissing matches between individuals here so please just don't do it. When it happens the post most times will simply vanish into cyber space.

Political or Religious posts belong in "Off Topic" but surly you can find other forums that host those discussions if it is your thing, I don't think anyone cares if you are Conservative or Liberal when we are out hunting gold nuggets.

You may not use this forum to advertise any other dealer, store, or product without written permission by owner at any time. Used items are allowed in the classified section.

This forum is not responsible for anything said by it's members at any time. This is a public forum and will remain so and although I can and will occasionally zap "bad content" I don't do it often and so far have never permanently banned a person. Also opinions expressed here do not always represent the opinion of the forum's owner!

Guests are welcome to browse the forum and use the information provided by registered members, but you can not post yourself until you are a registered member.

That is pretty much it my fellow Nugget Shooters so enjoy the forum, keep it clean and play nice.

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  1. Agate- Opal

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  2. Crystals

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  3. Purple red rocks ?

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  4. Red red rocks

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  5. Australite

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  6. Amethyst Geodes

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  7. Payson crystals 1 2

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  • Posts

    • If anyone here has metal detected for gold nuggets, I'm sure they've walked right over fluorescent rock and mineral specimens without even knowing it. It's estimated that 15% of all rock and minerals are fluorescent so that gives you some idea how common (or uncommon) they are. The most common are calcite and chalcedony which fluorese red and green under SW lamp respectively.  But there's about 500 other rocks and minerals that fluorese yellow, purple, blue orange, pink, etc. But not all fluorese in SW. Value is determined by aesthetics, size of specimen and the number of colors or combos.  A single color specimen would normally be worth less than a two colored one unless it was a rare species. Generally speaking the more colors, the higher the valuation but a lot of other factors can go into it.  It's estimated there's well over 10,000 collectors world-wide with the majority of them here in the USA so there's a good market for specimens. All that's required is a good SW field lamp as that's the most common wavelength...254nm. LW is 365nm and midwave I believe is either 302nm or 310nm. If I was going to recommend a SW field lamp this is the one I would get. https://www.engeniousdesigns.com/product-page/drk-light It can be used at night and on cloudy days. It's a little expensive but all it takes is one good specimen and it's paid for.  Most of you guys know where the local mines, tailing piles, outcroppings, etc are and those would be the obvious places to check first. But there's a lot of other areas where they could be found as well. All you have to do is search for them...      
    • There is a lot to be learned from the replies on this topic. Having the latest and greatest Minelab in your hand is a huge advantage. Sure, you'll dig more trash but you will also dig more gold. Little things like digging shallow holes when it's really hot out will go  long way in the number of targets you recover in a day. Stay out of those washes where there's 6 feet or more of overburden (and a 300 years of trash) above the gold that's most likely down on the bedrock.  Having said that, dig everything but be smart where you put that coil. When it cools off you may want venture into a good but trashy area and grid it. Clean up the good and the bad. There are lots of valuable coins as well as nuggets out there.  Last but not least, there is always a really good market for used Minelabs. One needs to consider that when making an investment in a new machine. 
    • Every rock that makes its way from outer space down thru earth's atmosphere is going to have indications of that violent passage on it.  It may take looking close with magnification but tell-tale signs will be there.  Close examination will uncover indicators like flow lines and/or crust whether it be primary fusion crust formed early in the passage or a lighter thinner type of crust formed later after disruption.  There can also be cases of melting and flowing, redepositing of material.  Also regmaglypts, thumbprint like excavations caused by ablation.  Some are easily identified, others take a little studying.  Then there can be cracking of the crust or partial fracturing of the stone.  These two are pretty common features and not hard to see in most cases.  All meteorites have made the trip thru the atmosphere.  I highly suggest studying these features and then when you find a suspect stone, look for those tell-tale signs.  Magnets will attract some but not all stony meteorites and then the attraction or magnetic susceptibility can vary greatly with different types of meteorites.  I hunt with my eyes, a metal detector, and I use a magnet rake but when I study possibles that I come across, I still look for the regmaglypts, crust, flow lines, fracturing, and so on.
    • The lamp is well-made and the company I linked has great service. The extra minerals they send with the lamp make a good comparative ID set as well.  If you’re going to be using it with someone else, pick up a spare set of UV goggles for it, that shortwave lamp is bad for the eyes. Find some scorpions and other cool stuff with it, it’s really neat to use around camp. You’ll be amazed how much fluorescent minerals you’ll find out there with it.  I don’t live in an area with uranium ore, but that may be something interesting to find with it too.
    • Kewl! I like that lamp. And the price is not too bad either.  Thanks!
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