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Newest topics and users posts
14 Nov-07:09:48 Re: natural history museum in oslo, norway by knut eldjarn (James Catmur)
14 Nov-06:57:30 Re: the mizunaka collection (Volkmar Stingl)
14 Nov-05:21:11 The mizunaka collection - rhodochrosite with fluorapatite (Am Mizunaka)
14 Nov-04:58:28 Re: the mim museum in beirut, lebanon (Mim Museum)
13 Nov-09:41:57 Re: collection of michael shaw (Michael Shaw)
12 Nov-16:23:19 Re: the mizunaka collection - rhodochrosite (Am Mizunaka)
12 Nov-01:08:39 Re: the mizunaka collection (Volkmar Stingl)
11 Nov-22:53:04 The mizunaka collection - quartz (Am Mizunaka)
09 Nov-11:33:47 Re: contribution dr. Menor-salván - volborthite and tangeite from milpillas (mexico) - (52 (Fmf Forum)
09 Nov-11:33:11 Contribution dr. Menor-salván - volborthite and tangeite from milpillas (mexico) - (52) (Fmf Forum)
09 Nov-09:41:30 Re: collection of michael shaw (Michael Shaw)
08 Nov-06:32:28 Re: don lum collection (Carles Millan)
08 Nov-03:35:38 Re: the mim museum in beirut, lebanon (Mim Museum)
07 Nov-23:49:49 The mizunaka collection - rhodochrosite (Am Mizunaka)
07 Nov-11:19:38 Re: collection of michael shaw (Michael Shaw)
07 Nov-11:17:19 Re: intermineral liège 2024 (Bob Carnein)
06 Nov-21:33:14 Re: intermineral liège 2024 (Matt_zukowski)
06 Nov-11:15:04 Re: where is this amethyst from? (Indigo08)
06 Nov-10:46:03 Re: where is this amethyst from? (Peter Megaw)
06 Nov-09:26:30 Re: where is this amethyst from? (Indigo08)
06 Nov-09:25:29 Re: intermineral liège 2024 (James Catmur)
06 Nov-00:02:50 Re: intermineral liège 2024 (Roger Warin)
05 Nov-17:13:28 Re: in memoriam - josé zendrera has left us, but josele is still here (Firmo Espinar)
05 Nov-17:06:21 Re: intermineral liège 2024 (Michael Shaw)
05 Nov-15:17:48 Intermineral liège 2024 (Roger Warin)

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  Topic: Minerals of the distant future
Tom Mazanec

Replies: 4
Views: 8555

PostForum: Minerals and Mineralogy   Posted: Aug 04, 2023 10:54   Subject: Minerals of the distant future
Will there be new mineral species millions of centuries in the future, after geology has processed a trillion tons of plastics, aluminum, etc.?
  Topic: Mineralogist curricula
Tom Mazanec

Replies: 5
Views: 4419

PostForum: Off-Topic and Introductions   Posted: Mar 19, 2022 13:24   Subject: Mineralogist curricula
What courses would you recommend for someone who wishes to be a mineralogist? What universities would be good to attend?
  Topic: Average Familiarity
Tom Mazanec

Replies: 0
Views: 11527

PostForum: Off-Topic and Introductions   Posted: Aug 13, 2021 09:37   Subject: Average Familiarity
Remember this when you talk to a layperson.
Check xkcd comic number 2501
  Topic: Hillman Hall of Minerals and Gems
Tom Mazanec

Replies: 9
Views: 11323

PostForum: Other Museums in USA   Posted: Jul 21, 2021 12:24   Subject: Re: Hillman Hall of Minerals and Gems
These are the stones I got from the museum souvenir shop. What minerals would these polished rocks be? Are they different species or a porous one that can be dyed? Or something else?
  Topic: Hillman Hall of Minerals and Gems
Tom Mazanec

Replies: 9
Views: 11323

PostForum: Other Museums in USA   Posted: Jun 12, 2021 09:36   Subject: Re: Hillman Hall of Minerals and Gems
Here is the T-shirt I bought at the museum.
  Topic: Hillman Hall of Minerals and Gems
Tom Mazanec

Replies: 9
Views: 11323

PostForum: Other Museums in USA   Posted: May 08, 2021 11:32   Subject: Re: Hillman Hall of Minerals and Gems
Had to delay till next month. We are picking out when now.
  Topic: Price changes
Tom Mazanec

Replies: 16
Views: 10937

PostForum: Off-Topic and Introductions   Posted: Apr 25, 2021 12:47   Subject: Re: Price changes
TOM,
There were 2 (!) personally self-collected examples shown, both used only as examples.

One was from 0 cost - $2750 offered, the other was from 0 cost - $3000 offered.
In my arithme ...
  Topic: Price changes
Tom Mazanec

Replies: 16
Views: 10937

PostForum: Off-Topic and Introductions   Posted: Apr 25, 2021 11:07   Subject: Re: Price changes
Being that this website forum is part of a dealer's website, I am not sure your question is appropriate. However, I will answer it in a different sort of way.

The 2 attached photos are 2 of my bes ...
  Topic: Price changes
Tom Mazanec

Replies: 16
Views: 10937

PostForum: Off-Topic and Introductions   Posted: Apr 24, 2021 11:19   Subject: Price changes
My books sometimes give an idea of how much a particular gem or mineral would cost. However, they say prices are very prone to change.
What are the biggest changes of the last five or ten years?
  Topic: How does color treating "work"?
Tom Mazanec

Replies: 6
Views: 4724

PostForum: Off-Topic and Introductions   Posted: Apr 24, 2021 06:25   Subject: How does color treating "work"?
I read you can change colors of gems by dyeing, heat or radiation. Dyeing I can understand, but how does heat or radiation change a stone's color? The heat cools off and the radiation dies out, and ne ...
  Topic: Hillman Hall of Minerals and Gems
Tom Mazanec

Replies: 9
Views: 11323

PostForum: Other Museums in USA   Posted: Apr 11, 2021 11:14   Subject: Re: Hillman Hall of Minerals and Gems
It is an excellent mineral museum. Enjoy it. But check before you go to make sure they are open!

We're going in mid-May. My cousin is handling all the details.
  Topic: Hillman Hall of Minerals and Gems
Tom Mazanec

Replies: 9
Views: 11323

PostForum: Other Museums in USA   Posted: Apr 11, 2021 07:26   Subject: Hillman Hall of Minerals and Gems
My cousin is taking me for a few days on a mini-vacation to Pittsburgh. Researching, I came across this collection in their Carnegie Museum of Natural History.
Anybody have any tips or reviews on it ...
  Topic: Raman Spectroscopes
Tom Mazanec

Replies: 5
Views: 4867

PostForum: Off-Topic and Introductions   Posted: Mar 10, 2021 18:18   Subject: Re: Raman Spectroscopes
Another promising technology mentioned on page 274 is infrared spectroscopy. Any of you use that?
  Topic: Raman Spectroscopes
Tom Mazanec

Replies: 5
Views: 4867

PostForum: Off-Topic and Introductions   Posted: Mar 09, 2021 16:29   Subject: Re: Raman Spectroscopes
Most of the online ads say "Contact us for price", but I saw a used one for $6500.
  Topic: Raman Spectroscopes
Tom Mazanec

Replies: 5
Views: 4867

PostForum: Off-Topic and Introductions   Posted: Mar 09, 2021 13:47   Subject: Raman Spectroscopes
My 2016 Gem Identification Made Easy (2016) on page 34 says

While it lacks portability and is not yet an affordable instrument (currently selling at approximately $12,000) for most of the readers o ...
  Topic: Beautiful durable and...common?
Tom Mazanec

Replies: 8
Views: 8287

PostForum: Off-Topic and Introductions   Posted: Mar 03, 2021 09:40   Subject: Re: Beautiful durable and...common?
SteveB:
Just reading this and it occurred to me -
Why would any country print six or fewer stamps of a specific kind?
  Topic: A gemstone Christmas
Tom Mazanec

Replies: 1
Views: 3548

PostForum: Off-Topic and Introductions   Posted: Mar 03, 2021 09:30   Subject: Re: A gemstone Christmas
Ordered myself a couple more for my birthday (March 5):
Gem Identification Made Easy (6th Edition): A Hands-On Guide to More Confident Buying & Selling
Matlins and Bonanno

The Jeweler's Direc ...
  Topic: Sometimes fluorescent
Tom Mazanec

Replies: 5
Views: 4743

PostForum: Off-Topic and Introductions   Posted: Feb 27, 2021 08:28   Subject: Sometimes fluorescent
Sometimes I read things like "Mazanecite is sometimes fluorescent."
"Sometimes"?
What would make one specimen of a chemical substance fluorescent when another specimen with the e ...
  Topic: New locations
Tom Mazanec

Replies: 7
Views: 5692

PostForum: Off-Topic and Introductions   Posted: Feb 07, 2021 09:43   Subject: New locations
Are we still getting new mineral locations? Or have they all been pretty much found? What are the big 21st Century discoveries, if any?
  Topic: Heat changes some minerals - how?
Tom Mazanec

Replies: 11
Views: 7037

PostForum: Off-Topic and Introductions   Posted: Jan 29, 2021 10:32   Subject: Heat changes some minerals - how?
How does heat change a mineral? It should not change the chemical composition (unless the stuff burns). If it is temperature that does it you would expect the change to revert when it cools.
What hap ...
 
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