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Magnetically riveting! *promote future *sift of the week*

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hmmm. from a googled website...

SO HOW CAN WE TELL IF IT'S REALLY GOLD?
These steps can help you determine if your gold is real, and possibly what the true purity is. There are many suggested ways to test gold, and these are some of the most common:
Step 1:
Rub the piece of jewelry across a piece of unglazed porcelain tile. It should not make a black streak. If it does then it is pyrite.If the streak is golden yellow then it is gold. Unglazed porcelain tile can be found at a hardware store.

Step 2:
Use the Moh's scale to determine the hardness of the metal. Gold has a hardness of about 2.5 to 3 on the Moh's scale. Glass on the other hand has a hardness of 5.5 on the same scale. Try scratching glass with the piece of gold. If it scratches the glass, it is definitely not gold, or is mixed with other metals and the purity is very low.

Step 3:
Hold a magnet near the piece of gold. If the magnet attracts the gold piece, then there are other metals mixed in the gold. This is not pure gold.

Step 4:
Purchase hydrochloric acid or sulfuric acid, rubber gloves, and protective eyewear from a hardware store. Use something like a small piece of glass to drop a very small amount of acid onto the gold. If the gold begins to dissolve, then there is some other type of metal mixed with the gold and it is not pure.

Could be, perhaps that's a safer option as well? (chamber integrity). Traditional Si/SiO CCD's are OK in the presence of high fields though. Modified linescan CCD's with MOS sensors replacing the photodiodes have actually been used as magnetic sensors for high discrimination applications in different fields in physics and chemistry, located at times in high pressure vessels at the focal point of some fairly high fields (12 to 20 T). But I still can't figure out how to use my GoPro. Have fun.

Pretty sure the old ~'50s cigarette vending machines didn't have future lasers and space magnets.

Always keep a nickle with a string tied around it I say.

Alestorm - Magnetic North (Scottish Pirate Metal) has been added as a related post - related requested by Lilithia on that post.

Alestorm - Magnetic North (Scottish Pirate Metal) has been added as a related post - related requested by Lilithia on that post.

Alestorm - Magnetic North (Scottish Pirate Metal) has been added as a related post - related requested by Lilithia on that post.

Congratulations! Your video, Magic Magnets (Smarter Every Day), has reached the #1 spot in the current Top 15 New Videos listing. This is a very difficult thing to accomplish but you managed to pull it off. For your contribution you have been awarded 2 Power Points.

This achievement has earned you your "Golden One" Level 11 Badge!

This is really cool! The 'spring' magnets and the possible applications? amazing. Can't wait to see what comes from this.

Your video, Magic Magnets (Smarter Every Day), has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.

*promote a magnetic *quality video!