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Newest topics and users posts
13 Oct-15:44:52 Re: possible belowda-law twin of quartz (Bob Morgan)
13 Oct-13:32:57 Possible belowda-law twin of quartz (Eric8he)
13 Oct-13:26:23 Re: collection of michael shaw (Sante Celiberti)
13 Oct-12:15:15 Hyalite glass opal from czech republic (Stoner)
13 Oct-11:52:14 Re: a mineralogical trip through germany / bayern - bavaria (Jesse Fisher)
13 Oct-09:42:48 Re: collection of michael shaw (Michael Shaw)
13 Oct-02:26:42 Re: monthly mineral chronicles, mineral guides and more... (Crocoite)
12 Oct-21:02:37 The mizunaka collection - quartz with chlorite (Am Mizunaka)
12 Oct-18:49:36 Re: a mineralogical trip through the states of usa - illinois (Bob Harman)
12 Oct-16:38:55 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
12 Oct-10:56:41 Re: help identification (Indigo08)
12 Oct-10:28:30 Re: collection of michael shaw (Michael Shaw)
12 Oct-10:26:07 Re: don lum collection (Don Lum)
12 Oct-05:41:40 Re: collection of sante celiberti - a mineralogical trip through italy (Dany Mabillard)
12 Oct-04:19:39 Re: collection of firmo espinar (Firmo Espinar)
12 Oct-03:12:36 Re: don lum collection (Philippe Durand)
11 Oct-17:23:07 Re: don lum collection (Don Lum)
11 Oct-16:35:53 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
11 Oct-16:16:12 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
11 Oct-13:58:57 Re: the mizunaka collection - quartz (Am Mizunaka)
11 Oct-03:12:03 Re: the mizunaka collection - quartz (Jordi Fabre)
11 Oct-01:12:52 The mizunaka collection - quartz (Am Mizunaka)
10 Oct-17:45:13 Re: collection of enrique llorens (Enrique Llorens)
10 Oct-14:11:19 Re: collection of enrique llorens (Jose Luis Jara Jara)
10 Oct-14:03:27 Liege intermineral show - small tribute to the agab (Jordi Fabre)

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  Topic: Rocks melting
Tom Mazanec

Replies: 2
Views: 758

PostForum: Off-Topic and Introductions   Posted: Feb 25, 2019 13:11   Subject: Rocks melting
How do most rocks melt if they are heated enough? Do they just all turn liquid at once, like ice at 0C? Does some of them melt and the rest not, like a sludge or slurry?
Does it just gradually soften ...
  Topic: Mohs mnemonic
Tom Mazanec

Replies: 0
Views: 682

PostForum: Off-Topic and Introductions   Posted: Dec 15, 2018 10:10   Subject: Mohs mnemonic
Tall Girls Can Fight And Other Queer Things Can Develop
TGCFAOQTCD
talc
gypsum
calcite
fluorite
apatite
orthoclase
quartz
topaz
corundum
diamond
  Topic: Percentage of pigment
Tom Mazanec

Replies: 6
Views: 3058

PostForum: Minerals and Mineralogy   Posted: Mar 15, 2018 05:54   Subject: Re: Percentage of pigment
I went to a great talk this week about how we can tell the color of fossilized creatures - surface features are key and they have nothing to do with pigments. So color can be caused by so many things ...
  Topic: Percentage of pigment
Tom Mazanec

Replies: 6
Views: 3058

PostForum: Minerals and Mineralogy   Posted: Mar 14, 2018 07:29   Subject: Percentage of pigment
In a colored stone which is of a colorless mineral (like ruby or sapphire), how much of the material is the pigment? One part per thousand? A ppm? A ppb?
  Topic: Concrete as a mineral
Tom Mazanec

Replies: 6
Views: 3153

PostForum: Off-Topic and Introductions   Posted: Jan 29, 2018 10:29   Subject: Concrete as a mineral
Suppose you analyzed a chunk of concrete as if it were a rock. What mineral would you identify it as?
  Topic: 3D printing in collecting
Tom Mazanec

Replies: 2
Views: 2703

PostForum: Off-Topic and Introductions   Posted: Jan 02, 2018 20:26   Subject: 3D printing in collecting
If you have a mineral collection and a 3D printer:
https://www.reddit.com/r/3Dprinting/comments/7nmrof/ive_started_printing_display_stands_for_my_rock/
(link normalized by FMF)
  Topic: Minerals sans life
Tom Mazanec

Replies: 15
Views: 7717

PostForum: Minerals and Mineralogy   Posted: Dec 16, 2017 22:28   Subject: Re: Minerals sans life
...it is idiotic to reason that the complex life on earth was the result of the advent of simple microscopic organisms that evolved into a hugely complex system that is the earth.Pierre, it is uncivil ...
  Topic: Percentage of minerals known
Tom Mazanec

Replies: 11
Views: 5606

PostForum: Minerals and Mineralogy   Posted: Dec 11, 2017 10:09   Subject: Percentage of minerals known
Have we discovered most of the minerals in the planet's crust? Half? Ten or Twenty percent? A few percent?
  Topic: Minerals sans life
Tom Mazanec

Replies: 15
Views: 7717

PostForum: Minerals and Mineralogy   Posted: Dec 06, 2017 17:41   Subject: Re: Minerals sans life
Would this mean no limestone type caves on a lifeless Earth, the kind with stalactites and stalagmites?
  Topic: Minerals sans life
Tom Mazanec

Replies: 15
Views: 7717

PostForum: Minerals and Mineralogy   Posted: Dec 06, 2017 12:05   Subject: Minerals sans life
Suppose the first proto-bacterium never formed. How would Earth's minerals differ? Would there be all the ~5,000 mineral species on the planet?
  Topic: New find of minerals from New York
Tom Mazanec

Replies: 123
Views: 149925

PostForum: The Ten Thousand Club   Posted: Dec 04, 2017 13:20   Subject: Re: New find of minerals from New York
Loved your pictures, especially the fluorescents.
Hope you hit 100,000!

Today you are 114130
  Topic: Lawn boulders
Tom Mazanec

Replies: 1
Views: 2286

PostForum: Off-Topic and Introductions   Posted: Sep 30, 2017 10:59   Subject: Lawn boulders
What goes into putting a decorative boulder (say 20in/50cm) in your street lawn. Who would do it (a landscaping company perhaps)? How much would it cost? Would you have to get permission? Any other co ...
  Topic: Twenty basic minerals
Tom Mazanec

Replies: 8
Views: 5768

PostForum: Off-Topic and Introductions   Posted: May 29, 2017 08:08   Subject: Re: Twenty basic minerals
I've been collecting my entire life and a large amount of GneissWare's list I couldn't readily identify on the spot or even guess at. The original question I agree is itself wrong and it wil depend on ...
  Topic: Twenty basic minerals
Tom Mazanec

Replies: 8
Views: 5768

PostForum: Off-Topic and Introductions   Posted: May 28, 2017 07:35   Subject: Twenty basic minerals
There are thousands of described minerals. I am sure nobody is familiar with all of them. But a few (say a score) I would imagine to be ones every mineral enthusiast would be expected to know.
Which ...
  Topic: -ite and -lite
Tom Mazanec

Replies: 9
Views: 5896

PostForum: Off-Topic and Introductions   Posted: Apr 02, 2017 15:03   Subject: Is -ite mandatory?
I know some "old time" mineral names ended in other syllables, but all the newer ones seem to end in -ite. Is this an official rule, or could the discoverer end the name in something else if ...
  Topic: -ite and -lite
Tom Mazanec

Replies: 9
Views: 5896

PostForum: Off-Topic and Introductions   Posted: Apr 02, 2017 07:21   Subject: Is -ite mandatory?
Is there a requirement for new mineral names to end in -ite? I know "old time" names sometimes ended in other syllables, but all the recent ones seem to have the "standard" suffix. ...
  Topic: -ite and -lite
Tom Mazanec

Replies: 9
Views: 5896

PostForum: Off-Topic and Introductions   Posted: Mar 19, 2017 11:52   Subject: -ite and -lite
If the word a mineral is named after ends in a vowel, is the suffix -lite? For example, a mineral discovered on Hawaii would be named Hawaiilite, not Hawaiiite?
  Topic: Mineralogy by Dexter Perkins
Tom Mazanec

Replies: 14
Views: 10998

PostForum: Mineralogical Literature   Posted: Jan 03, 2017 18:03   Subject: Re: Mineralogy by Dexter Perkins
Tom, honestly I think your being too generous. Considering the advancements in digital photography, I think an update on the color photographs should have been done for the 3rd edition.

Plate 2 by ...
  Topic: Mineralogy by Dexter Perkins
Tom Mazanec

Replies: 14
Views: 10998

PostForum: Mineralogical Literature   Posted: Jan 02, 2017 11:52   Subject: Re: Mineralogy by Dexter Perkins
Read chapters on analysis and atomic structure.
It also has descriptions of important minerals (random fact: the alpha of the halite unit cell is 5.6404 A. It gives me a warm, fuzzy feeling to know t ...
  Topic: Mineralogy by Dexter Perkins
Tom Mazanec

Replies: 14
Views: 10998

PostForum: Mineralogical Literature   Posted: Dec 27, 2016 12:47   Subject: Re: Mineralogy by Dexter Perkins
Read chapters on analysis and atomic structure.
It also has descriptions of important minerals (random fact: the alpha of the halite unit cell is 5.6404 A. It gives me a warm, fuzzy feeling to know t ...
 
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