Archive for the ‘Rock Hunts’ Category

Bonnie’s Great Datolite

Monday, September 21st, 2009

My wife Bonnie has been tagging along half-heartedly with me to Keweenaw Week for several years.  She likes wearing my jewelry, but just never has found anything that got her really excited and proud.  It always seemed like a lot of rock to look through, with most of it turning out to be nothing good.  Those copper tailing piles are really big, and looking for the “good stuff” is a lot like looking for a needle in a haystack.  And I hate her dragging non-jewelry grade stuff home and mixing it up in my barn with all my real treasures.  (That barn is a whole other story.  One that may never be told.)

Datolite is an elusive gemstone.  We went to a mine that we’ve been to many times, hoping to find some good datolite.  Of course for Bonnie this would be her first datolite, and she really had some low expectations.  She’s spent hours digging holes that never gave up anything to take home.  We have friends who seem to be able to just smell them and go right to them, and bring home a great story to brag about.  Bonnie just wanted to find ONE.  We chose to dig under some trees, figuring whatever was there hadn’t been seen in a long time.  As the dig progressed Bonnie got dirtier and dirtier.  That was the main thing I noticed. She made a pretty big hole, and pulled out a large chunk of rock that had two small (4-5mm) rounded white spots sticking out of one side.  Now that’s the magic formula:  rounded and white, so Bonnie put it in her bucket.  It did register on the metal detector, so that was good too.  But really, it didn’t look like much (those two small white spots are way too small for me to make jewelry with, that’s how I judge rocks).

Bonnie found one other datolite, not huge, but big enough to make jewelry from, so she was pleased with that.   I got some cutting material, rock with copper running through it that should turn out pretty.  We went home not too excited and I took a nap.  Bonnie went to a faucet outside and began to scrub away  some dirt from her rock with “twin towers” as she referred to them.  The more she scrubbed, the more excited she became.  A strip of white datolite began to show up on the bottom, other white rounded areas and some small copper points were poking out.p8120186

She continued to scrub off mud, finding more white nodules and got really excited.  I wanted to see what the copper would really look like, so I gave it a quick acid bath.  See for yourself.  Bonnie’s “boring” datolite find, her very first, turned out to be a beauty that any rockhound would be ecstatic to find!  This is part of the charm that keeps rockhounds coming back to the Keweenaw year after year.  I expect she’ll be more excited about our rockhunts in the future.  Copper and datolite nodules combined in one terrific stone clump.  What could be better?

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Mohawkite

Monday, September 14th, 2009

Originally named after the primary source at the Mohawk Mines (copper mines) in Mohawk, Michigan, Mohawkite is a rock that closely resembles fine gold in quartz from California.

Algodonite and domeykite are the two principal arsenides found in the Keewenaw. These two minerals when mixed with arsenian copper form Mohawkite. Mohawkite is one of them many historical names for this mixture. The Mohawk #2 as well as mines at Ahmeek were the primary source for this rock. A little know factoid is that over 100 metric tons of Mohawite were removed from the Mohawk mine between 1900 and 1901. The Mohawkite was massive in nature. p9130106

I have hunted Mohawkite on organized trips in the Keweenaw. I believe the Mohawk spoil piles are private property so make sure permission is gained before going on these piles. Mohawkite is elusive and requires some luck and a good metal detector to find.

I always treat Mohawkite with respect when working with it, always using gloves and a mask when grinding and polishing. I also change the water on the Genie and any saws I use after finishing with Mohawkite.

After the Mohawkite cabochon is polished, it is fairly docile (unless you plan to eat it!). I have been experimenting with coating the cabochon with industrial epoxy. This seals the metals against tarnish, but having said this, some people like the tarnished-natural look and prefer a natural, polished stone.

Mohawkite is an unusual and obscure jewelry material, and one of those special rocks to be found only in my favorite rock hunting location, the Keweenaw Peninsula.

I sell Mohawkite jewelry both on this website and at our art shows.

The Beach Hunt

Sunday, April 26th, 2009

I finally got out to search for Petoskey Stones on the beach. I will confess that this particular hunt site is in the Charlevoix area, but I am sworn to secrecy on the exact location.p4190018

This was the first weekend that the snow had cleared enough in the woods to get to this area. It is very remote and requires a 4WD to get to it. I went with my best rock-hunting buddy Gary. We had great expectations of finding a good quantity of Petoskey stones as well as high quality Favosites, and were not disappointed.

It actually sprinkled continuously while we were hunting, which made the stones on the beach stand out. The water was smooth so we could also see the rocks in the water. Within a month of ice leaving the area rocks become covered in slime and moss, making it almost unhuntable (my spell check says this is not a word, but I like it anyway), so early spring is the only time to have good hunting in this area. This is a prime example of knowing when to hunt certain areas and when not to. I’m sure, for example, out west you would hunt hard in the cooler weather and not hunt the desert in the summer.

Normally we park our truck at the end of the hunting area and hike the beach back the way we came in. We take a couple empty buckets and dump any buckets we fill next to the trail we came in on, then pick up full buckets as we leave.

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Indeed it was a great hunt as anticipated. Gary and I each filled a five-gallon bucket with high quality stones. This took a couple hours. Next time we’ll take our insulated waders so we can check further out in the water for the “big” ones.

As an aside, it is April 22nd as I write this and we had snow again last night. When will the winter end?

First Petoskey Stone Hunt of 2009

Monday, April 20th, 2009

Living in northern Michigan is sometimes harsh, as it has been this winter. We have officially had snowfall for 7 months in a row. This is April 18th and there are still some snow piles scattered about.

On April 3rd Bonnie and I made a trek out for the first Petoskey Stone hunt of the year, to one of the private gravel pits we hunt . We did not expect much as it was dry, but we were honestly stir-crazy and wanted to get out.  Normally we hunt Petoskey stones in the rain because they show up better.

I checked one of the streams from the melting snow and discovered a few small stones in the clear cold water. Good thing for the gem scoop as I would not have relished putting my hand in that cold water to retrieve a rock. Bonnie picked up a few right out on the flat ground of the pit. This time of year the stones are clean and stick out well on the washed sand.

It did sprinkle a little, which helped find more stones on some of the gravel piles. I checked the rock falls (These are stones which eroded out over the winter and fell to the bottom of the steep gravel banks), always a good place to look. I found a good quantity of nice stones in these falls including two high-quality pink Petoskey Stones.  We also found a nice Puddingstone, which is not native to our area, but was brought here by glaciers from Sudbury, Ontario which is 150 miles away.p4190023

We are awaiting a good rain so we can go out and find greater numbers of stones.

My best find of the day was a softball sized and flawlessly-patterned beauty. I’ll probably polish that one and sell it with a tripod stand. We ended the day with about 35 pounds of really nice stones, an excellent first hunt.

I’m happy the winter is over and a beach hunt is scheduled for next week. I’ll keep you informed.


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