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Lapidary / Gemstone Community Forum
June 15, 2019, 11:12:33 pm
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1890 Minerals from Jeweler labled "Carbon" but they shine like Diamonds

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Author Topic: 1890 Minerals from Jeweler labled "Carbon" but they shine like Diamonds  (Read 180 times)
rob71
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« on: December 12, 2018, 11:30:25 pm »

Hello,

I need some Id help , these all shine like Diamonds and set my tester off .. I have no idea what mineral these are and I have searched a lot .. I see things that are close but not the same.

I actually thought they were Diamonds at one point .. no idea what they are but they are beautiful with many different colors.

Any help would be tremendously appreciated. Thank you.

They pin my Diamond Tester.


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Taogem
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« Reply #1 on: December 13, 2018, 09:45:26 am »

Welcome to the forum ..

From this pic, I can not tell..  dunno
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rob71
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« Reply #2 on: December 13, 2018, 01:21:56 pm »

Thank you it is a real Mystery .. they do not stick to a Magnet and I just cannot find what I am looking at here.

The Jeweler is my Girlfriends Great Grandfather we have his Desk from 1890 and we use it as a TV entertainment center but we left all of his tools in there.

These were in the desk in a small metal cylinder that was labeled "Carbon" but he made Diamond Rings every day.. If anyone has any idea I would appreciate it.


Thanks for the welcome.


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rob71
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« Reply #3 on: December 13, 2018, 01:23:21 pm »

another picture


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rob71
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« Reply #4 on: December 13, 2018, 01:24:24 pm »

oops same picture , sorry


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slabbercabber
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« Reply #5 on: December 13, 2018, 02:01:09 pm »

That looks like corundum, grinding slag.
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Debbie K
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« Reply #6 on: December 13, 2018, 05:03:37 pm »

I respectfully disagree. This may be carbonado, and if so, has some value. The thing that should make you suspicious that they may be carbonado is that they were in a tin marked "carbon", they appear to have iridescence and that they do set of a diamond tester. Carbonado is harder than diamond, and if low quality it's used as industrial abrasive. If these are solid, they are probably worth something. They are what are referred to as "black diamonds" and are rare. Most black diamonds on the market today are not natural, and these probably are.

Where did your girlfriends great-grandfather live? If you could establish their provenance, they'd be worth more.

Wish they were mine...

https://www.mindat.org/min-27227.html
https://www.gemsociety.org/article/black-diamonds/
https://www.gemologyonline.com/Forum/phpBB2/viewtopic.php?f=6&t=24757&hilit=carbonado
https://www.ebay.com/sch/110733/i.html?_from=R40&_nkw=carbonado

Debbie


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rob71
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« Reply #7 on: December 13, 2018, 06:26:59 pm »

You have my attention thank you so much .. I was suspicious that they could be some form of diamonds . if indeed they are what kind of value are we talking about?

Pretty exciting if they are , thank you so much Debbie now I need to know what to do to verify if indeed they are.

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rob71
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« Reply #8 on: December 13, 2018, 06:32:37 pm »

Mine do look like them but different because mine are real and I can definitely prove the provenance I have pictures, Postcards. Business cards from the 1890s.

I wonder what these would sell for being natural if they are Carbonado .. I think they might be..

thank you for the help.
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rob71
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« Reply #9 on: December 13, 2018, 06:37:26 pm »

Debbie Caribou Maine is where the Jewelry shop was.
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Debbie K
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« Reply #10 on: December 13, 2018, 07:03:46 pm »

Rob:

They look like they vary in price, so hard to say what their value would be. Carbonado only comes from 2 places, Brazil (or S. America) and Africa. It's speculated that they were part of a meteor impact; read about it on Wikipedia or the Gem Society article that I attached previously.

I don't know who would probably collect them other than mineral collectors. There look to be one or two that are really nice specimens and would probably have much more value that way than "gemstones". If you go on the Mindat.org website, at the bottom of the page there is a list of mineral sellers; it may be a good idea to contact several of them to see if there is any interest. Also, weigh a few of the larger ones and see how many carats they weigh; you can compare what you have to what's listed on Ebay.

If you have a gem and mineral society in your area, go to it and see if there are any gemologists there. They could give you an idea if these are what we think they could be. This is the most important thing to do; until you know what these are, all of this discussion is moot.

What is surprising to me is the nice structure these have, they're not as amorphous as many of the other ones I've seen. (Which may mean that they're not carbonado). Anyway, let us know what you find out. This is interesting!

Debbie
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rob71
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« Reply #11 on: December 13, 2018, 07:10:11 pm »

Thank you so much I will let you know they glimmer like Diamonds but I will follow your instructions to see what I have here.

I have a scale how do I do karats? I am a novice when it comes to this stuff.


thank you!
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Debbie K
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« Reply #12 on: December 13, 2018, 07:15:59 pm »

Rob: Here's a list of clubs in the US: http://www.rockhounds.com/rockshop/clubs/

If your scale is digital, you usually can set it for different things like grams, ounces or carats. If it's a manual scale it's probably in grams and you'll have to convert it to carats. https://www.metric-conversions.org/weight/grams-to-carats.htm If it's ounces or anything other google for conversions from whatever it is to carats. Gemstone scales are usually accurate to .01 carats; kitchen scales aren't good enough.

Debbie
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rob71
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« Reply #13 on: December 13, 2018, 07:32:20 pm »

Thank you! Some of the pieces are fairly large .. they have every Color in them.. thank you for the help being able to do Karats is going to be very helpful to me.. awesome.. thanks so much.. I hope they are legit!

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Debbie K
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« Reply #14 on: December 13, 2018, 07:38:00 pm »

So do I, Rob. Please do let us know what you find out. The funny thing is, if you had posted this 6 months ago I wouldn't have known what these might be. I read about them on the GemologyOnline forum a few months ago; never had heard of them before.

Good luck!

Debbie
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