While we were wrapping specimens, I held up one of the larger crystals and
announced to the gang that I just had to take it home to photograph. (Sure, Mike . . . we believe
that . . . I could see the sarcasm in their eyes. Heck, I wasn't even fooling myself.). The
specimen was completely coated with brown iron oxide - the following picture was taken after a few
days of soaking in Super Iron Out.
By the way - generally, I have found that the best way to clean quartz on matrix specimens
is to heat them in oxalic acid. This is the principle method used by Arkansas quartz mining
operations. We have a propane turkey fryer and large pot to serve this purpose. However, a
few of our recent smoky quartz finds at the Diamond Hill quartz mine posed a dilemma for me
in that they are too big to fit in my pot. So, I put on my thinking cap and came up with a new
way to "cook" the monster specimens.
I searched the NET and discovered a product called a "bucket heater". Chrissy and I
found the bucket heater pictured below at our local Tractor Supply store for $34.
Allied Precision Bucket Heater
#742G 1000 watts, 120 volts
The same bucket heater can be purchased at the following website:
http://www.pet-dog-cat-supply-store.com/shop/index.php?page=shop/flypage&product_id=6961
According to the literature that came with the bucket heater, it designed
to be immersed in water and will slowly heat it up to around a maximum 180-degrees, depending
on the volume. The design of the heater is such that it can placed in plastic containers
without fear of melting them. I placed the heater and iron oxide-coated specimen into a large
plastic container containing an oxalic acid/water solution (1 lb acid/3 gallons water) for
about 6 hours (outside, of course) and was very pleased by the following result.
Click on the above picture to enlarge
The oxalic acid solution turned the bucket heater's metal guard gray, but
the unit does not seem any worse for wear. Now I have a way to cook our big stuff, so look out!
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