We had a great Grand Re-Opening on Saturday, April 15. We enjoyed getting to visit with people we hadn't seen in over two months of moving!
Thanks for all of your patience while we continue to get rocks and other things out on display.
We've resumed regular hours of
9:30 am to 6:00 pm Monday through Saturday
at 1017 South Main Street, Salt Lake City.
Mail/Internet orders continue to go out daily. Also, telephone lines are now working, so you should be able to reach a live person most of the time.
We are between Sears and Franklin Covey Field on Main Street, which is great, because we can sit on the sidewalk in front of the store and watch the 'after ball game' fireworks. Ok, so we only did that once when we were there late painting, but it was fun!
Come in and check out the new store. It is a cute Spanish style building built in 1929. We've kept a lot of the building's history exposed. And most importantly, we've created lots of room for rocks.
See you soon...
Rick & Anita
Wednesday, April 19, 2006
Monday, April 03, 2006
Coin Cleaning with a Rock Tumbler
Small amounts of corrosion on coins (from being buried in the ground or from being left in a pool or fountain for too long) can be removed with a rock tumbler and a mild acid.
This is done by placing the coins in a rotary tumbler or vibrating tumbler so that the tumbler barrel is 3/4ths full. Add some water to cover the coins. For a large tumbler barrel add 1 cup of vinegar and let it run for about 6 hours. Check and if they are not done let them go longer. You can do this for up to 2-3 days.
For heavier deposits on the coins, you will have to mechanically remove the corrosion. Do this by placing the coins in the tumbler and adding 60/90 grit (1 pound per 10 pounds of coins) and letting them run for 6 hours. Rarely, they may need longer.
Some people add vinegar to the 60/90 grit for an even more effective corrosion removal. This requires removing the acid from the coins after they are finished. Do this by flushing them with distilled water for several minutes.
For small amounts of coins, you can use a small tumbler. Small tumblers are recommended for the prospectors who find occasional coins.
For companies and churches who have large numbers of coins, I recommend a 40-pound tumbler.
Coin Cleaning with Rotary tumblers vs. Vibrating tumblers:
Rotary tumblers take longer but are more effective and cost less.
Vibrating tumblers will NOT remove the heavy scale or corrosion. They will remove light scale and corrosion in 2-3 hours. If you have heavy corrosion and try to use a vibrating tumbler, you will not get the coins clean enough for a bank.
This is done by placing the coins in a rotary tumbler or vibrating tumbler so that the tumbler barrel is 3/4ths full. Add some water to cover the coins. For a large tumbler barrel add 1 cup of vinegar and let it run for about 6 hours. Check and if they are not done let them go longer. You can do this for up to 2-3 days.
For heavier deposits on the coins, you will have to mechanically remove the corrosion. Do this by placing the coins in the tumbler and adding 60/90 grit (1 pound per 10 pounds of coins) and letting them run for 6 hours. Rarely, they may need longer.
Some people add vinegar to the 60/90 grit for an even more effective corrosion removal. This requires removing the acid from the coins after they are finished. Do this by flushing them with distilled water for several minutes.
For small amounts of coins, you can use a small tumbler. Small tumblers are recommended for the prospectors who find occasional coins.
For companies and churches who have large numbers of coins, I recommend a 40-pound tumbler.
Coin Cleaning with Rotary tumblers vs. Vibrating tumblers:
Rotary tumblers take longer but are more effective and cost less.
Vibrating tumblers will NOT remove the heavy scale or corrosion. They will remove light scale and corrosion in 2-3 hours. If you have heavy corrosion and try to use a vibrating tumbler, you will not get the coins clean enough for a bank.
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