Rock Spot

how to spot silver and gold in a rock that contains Garnets?

I think i may have this situation

Garnets are a family of common rock-forming calc-silicate and aluminum silicate minerals, found in high temperature metamorphic and igneous rocks, as well as alluvial placers. The only common type of mineral deposit that could reasonably be expected to contain gold +/- silver with garnet would be a skarn. They are heavy and resistant to weathering and therefore they can accumulate in placer deposits - but you said you have a rock.

Identifying gold and silver in a rock containing garnets would be the same as identifying gold and silver in any other rock.

Most silver is found in nature as a mineral - in other words silver is usually combined with other elements such as sulfur, lead, and arsenic as a compound. Native silver is very rare.

Gold is usually found in its elemental form. Native gold (called visible gold or "VG" by geologists and prospectors) is quite rare, but can be identified by its bright yellow color, metallic luster, lack of oxidation, malleability and generally amorphous character. It can be further determined by high conductivity and specific gravity.

Muscovite mica is commonly mistaken for silver by non-specialists, and phlogopite mica, pyrite, and chalcopyrite may look like gold to the untrained eye.

If you still think you've really got gold and silver, most mineralogy departments at your local university could check it out for you, or you could ask for a geochemical analysis at a laboratory like ALS Chemex, Acme Labs or Omac Labs.

www.alschemex.com
www.acmelab.com
www.omaclabs.com

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Solar Accent

can I underpower LED lights?

I'm considering using LED UV light bulbs (3 or 5mm) to help grow some plants in my room this summer. I would just use the window and the natural sun, but my only window will be occupied with an air conditioner. Now the question, i was thinking of using led lights for this, and powering them off of a small solar panel i might place outside the window. Because plants require 12 hours of light, and darkness in a normal day, I'd like them to only be active for 12 hours a day. Would leds work under the constantly changing voltage of a solar panel as the sun moves and sets, or would they shut off, or receive some damage?

You can under power them, but it will not hurt them. I have 12" UV LED light that have an inverter that powers them, the power draw is minimal and the output is amazing. I hooked them up to a car battery charger on 2amp trickle charge and ran them for 6 months straight with no problems.

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Plastic Solar

How can I make a small, self-contained solar oven?

How can I make a solar oven from a cardboard box about 26cm by 10cm into a solar oven? I want to be able to do it with basic materials such as duct tape, Foil, Baking Pans, Clear plastic, etc. Also, I want to do it without any magnifiers or hazardous materials.

The solar oven plans I have are made with iron and glass. There is a cardboard solar reflector plan, with aluminum foil. They are both quite complicated, and come from the book: Roughing it Easy, by Dian Thomas. You might check with the boy scouts or girl scouts for easier oven plans. I'd google it if I wanted to do this, which I might this spring with my troop. Good luck!

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Blinking Led

How do I make a blinking LED light? Is their a web page with pictures and directions?

go to: http://www.hobbytron.com

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Flower Lights

What is a good flower bush that only grows about 2 feet tall?

I am wanting to outline my driveway with a Colorado Blue spruce then a flower bush then a solar spot light then another flower bush then another colorado blue spruce and keep repaeting that on both sides. So I wanted to know a pretty flowering bush that at most grows to 2 foot tall, I prefer 1' -1 1/2 foot , that goes great with a colorado blue spruce.

If the area is in the shade of the trees, then Skimmia, or Azalea would be a good choice.
For sun areas Spirea, Viburnum, Weigela, Genista, Heather, Daphne, Leucothoe, Pieris, Potentilla, Rock Rose, and Shrub Rose.
Most shrubs don't bloom for very long. It is best to pick an evergreen shrub, if it is to be on "display" on your driveway.
Give it plenty of room away from your Blue Spruce, because the tree roots will take over and kill the shrubs when they are larger. The shrubs can be maintained to the desired height by pruning.

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Power Led

If I wanted to power an LED using body heat does you body produce enough to do so?

What would I need to transform body heat into energy? Maybe this hasn't been discovered yet, but I do believe it has, any help is greatly appreciated. Thank you!

The quantity is plenty, about 100 watts. Harnessing it is the difficulty.
About a year ago, there were some scientists working on the problem in Germany. There are other efforts I found in a google search, but you can do that as well as I can.

Basically, to use heat to harness energy, you need to have a significant tempurature differential. I believe the german idea is to use microcircuitry to take advantage of a much smaller tempurature differential than we can utilize today.

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Color Changing

where can i buy the color changing sprinkles?

Was wondering if anyone knew where to buy those color changing sprinkles?? magic sprinkles or something? i know they use them in the kid cuisine frozen dinner. now baskin robbins have them.. anyone knowwww? my kids want them bad!

idk.. baskin robbins has the most annoying commercial so i turn it before i hear that annoying voice!

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Color Led

what is the best way to calibrate the color of my led monitor, to ensure I print the correct picture?

I use a mac with an cinema display, and a HP printer. I want to ensure that the color I see is the color that will print. How to do this in a pratical and inexpensive way?

If you have installed adobe products, there is a tool (i forgot the name) to calibrate your screen...

There exists also (very expensive) hardware solutions. But i guess the solution above should do the trick.

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Rock Led

Does anyone know of any good Christian rock bands led by women?

Most Christian music I find that are sung by women are pop or folklore type stuff. I am more into Christian rock music and I have a wide array of such but none with women singing.

Flyleaf is really good.

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Outdoor Lighting

Any outdoor lighting people out there?

I have low voltage lighting in the garden, I have a tiki mask I would like to have a low voltage light to shine on its face at night, the ones I have now are way to bright, solar would be ok, any ideas on how to do this?

Lower wattage bulb
Heat resistant paint on the lenses
move fixture further away from the mask

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Leds Lamp

What do YOU think of global warming?

It is not something that you may or may not belive in - but, it is something that you will eventually not be able to ignore.
Given the chance, would you push the entire planet away from nuclear and carbon emissions and lead it towards the power of fusion, solar energy, wind farms and bioelectricity?
Would you stop the production of incandescent lamps, gas-burning engines,- oil refineries, drilling rigs and coal mines?
Would you make a push for the revolution of electrical engines, LEDs and CFLs?
You must realize that the reality of global warming is something that we have the solution to but really are just too lazy and dependent to care.

I'm an American deeply disappointed in George Bush on a variety of issues, but when he declared global warming is a scientific concept and his advisers backed him, I knew our country was being led by a total idiot and his playmates.

Back in the 70's I had the A/C unit removed from my car -- a sacrifice, I live in Florida -- to help stop FCs contaminating the atmosphere and harming birds and wildlife. I make the common-sense choices to help lessen my contributions to global warming.

I am afraid of global warming and the way it is accelerating faster than predicted. It is frightening that something we do has negative impact on Iceland and the Poles, that we are directly contributing to the drowning of polar bears and deaths of penguins and seals with our insistence on clinging to fossil fuels and our way of life, expecting everyone else to make sacrifices.

We may have solutions to global warming, but it seems a committed few are willing to embrace them. Months ago I was stuck behind an SUV with a W bumpersticker, and another that read, "Stop Global Whining." The only reason I didn't ram that sorry jackal is because I couldn't afford to repair my car.

I read recently that scientist are considering deliberately releasing air pollution high into the stratosphere as a temporary protection for Earth, to buy time for our slower solutions to work and to prevent Arctic ice from melting further. I think it will take something that extreme to not only buy us the time we need, but to impress more people that everyone in an industrialized society is contributing to global warming, and everyone has to make sacrifices to save our planet, not just the "Greenies" and a handful of Democrats in the US, and all the other countries while USA remains the worst offender, and will -- for the next two years.

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Dog Lantern

Where does this osund like?

raining cats and dogs. forest. darkness. lanterns as lights, highways, houses, cottages, small villages, old fashioned stuff, farms, animals, haunted houses, weed, trees, flowers, gardens, candles, lamps, apple picking, mounatins, lakes, rivers, brooks, and praries

Pennsylvania

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Garden Rock

how can I make a feng shui zen rock garden for cheap?

how can I make a feng shui zen rock garden for cheap?
Its the one with the white sand, rake,and rocks. I really want one for my desk at work because I heard it is a great relaxer and helps for a stress free enviroment. I just do not want to pay the 30.00 for something like this. have any idea's on how too make it for cheap?

Here are some pretty patterns to copy:

http://www.zengarden.co.za/

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