FMF - Friends of Minerals Forum, discussion and message board

Since Mars gravity is 0.376 of earth...and if density were to be the same for dust, then a thinner atmosphere (much thinner) would still pick up a slightly larger particle size that the same flow on e ...

don't forget the dog :-)

Dale

Reiteration:

I am almost 64 years old so my first rock was a long time ago. May not remember my first rocks accurately but ...My grandmother owned a small inactive farm and I spent a lot of time th ...

I have a small sample from Afghanistan. I'm quite happy with mine although it isn't anything special. Mine has pyrite in it too.

Dale

The white could be calcite..that is pretty common with lapis.

The main source is Afghanistan and has been for about 6000 years.

It can also be found in the Chile, Siberia, Angola, Argentina, Bur ...

Looks like Serpentine to me...but without some testing we will never know.
Color is by far the least useful piece of information. In my opinion.

Dale

I once did some work on a property (in Texas) where the owner had a windmill flowing into a cattle watering trough. He never cut the windmill off and where the water overflowed at one end was a carbon ...

I believe that is a Alkali-Aggregate Reaction (AAR).

Depending on the type of aggregate there are other reactions that can occur,
In siliceous aggregates, the reactions are called "alklali si ...

Unfortunate.

In New Zealand massive Kauri wood is dug up from under farms and it is dated to 50 thousand plus years old with no sign of petrification. Makes for some very expensive conference tabl ...

In 2004, five Japanese scientists published examples of rapid petrification in Sedimentary Geology. The team of scientists, led by Hisatada Akahane, had analyzed a small lake in the explosion crater o ...

I remember a case we studied in one Geology or Hydrology class where fence posts were replaced and the old posts had been there for 20 or thirty years. The bottom part in the ground was petrified and ...

Got this today. It is Native Copper from Central Arizona USA. A friend who lives there sent it to me. He no longer remembers precisely where he harvested it. It weighs 95.74g.

Dale

Green might be Serpentine? maybe.

Dale

Looks like Marble to me instead of Limestone. Don't know what the Green stuff is but green is common in marbles. I don't recall seeing anything green In limestone's before but doesn't surprise me it c ...

I have about 125 in my have and want list. But mine is very customized to my interests. For instance I have maybe 20 different quartz's whose only difference is color. My collection is also weighted t ...

Author	Message
Topic: A potpourri of musings....barely related to minerals.
Dale Hallmark Replies: 8 Views: 13656	Forum: Off-Topic and Introductions Posted: Jun 13, 2019 08:31 Subject: Re: A potpourri of musings....barely related to minerals.
Dale Hallmark Replies: 8 Views: 13656	Since Mars gravity is 0.376 of earth...and if density were to be the same for dust, then a thinner atmosphere (much thinner) would still pick up a slightly larger particle size that the same flow on e ...
Topic: Your very first rock?
Dale Hallmark Replies: 14 Views: 49366	Forum: The histories behind mineral specimens Posted: Dec 08, 2018 21:37 Subject: Re: Your very first rock?
Dale Hallmark Replies: 14 Views: 49366	don't forget the dog :-) Dale
Topic: Your very first rock?
Dale Hallmark Replies: 14 Views: 49366	Forum: The histories behind mineral specimens Posted: Dec 08, 2018 20:45 Subject: Re: Your very first rock?
Dale Hallmark Replies: 14 Views: 49366	Reiteration: I am almost 64 years old so my first rock was a long time ago. May not remember my first rocks accurately but ...My grandmother owned a small inactive farm and I spent a lot of time th ...
Topic: Question about Lapis
Dale Hallmark Replies: 8 Views: 11513	Forum: Off-Topic and Introductions Posted: Oct 15, 2018 12:59 Subject: Re: Question about Lapis
Dale Hallmark Replies: 8 Views: 11513	I have a small sample from Afghanistan. I'm quite happy with mine although it isn't anything special. Mine has pyrite in it too. Dale
Topic: Question about Lapis
Dale Hallmark Replies: 8 Views: 11513	Forum: Off-Topic and Introductions Posted: Oct 15, 2018 11:06 Subject: Re: Question about Lapis
Dale Hallmark Replies: 8 Views: 11513	The white could be calcite..that is pretty common with lapis. The main source is Afghanistan and has been for about 6000 years. It can also be found in the Chile, Siberia, Angola, Argentina, Bur ...
Topic: Green petrified wood WA State?
Dale Hallmark Replies: 6 Views: 11552	Forum: Minerals and Mineralogy Posted: Jul 12, 2018 15:09 Subject: Re: green petrified wood wa state?
Dale Hallmark Replies: 6 Views: 11552	Looks like Serpentine to me...but without some testing we will never know. Color is by far the least useful piece of information. In my opinion. Dale
Topic: Carbonates form on ponds in Oman like ice
Dale Hallmark Replies: 6 Views: 12962	Forum: Minerals and Mineralogy Posted: Apr 28, 2018 12:21 Subject: Re: Carbonates form on ponds in Oman like ice
Dale Hallmark Replies: 6 Views: 12962	I once did some work on a property (in Texas) where the owner had a windmill flowing into a cattle watering trough. He never cut the windmill off and where the water overflowed at one end was a carbon ...
Topic: Concrete as a mineral
Dale Hallmark Replies: 6 Views: 11066	Forum: Off-Topic and Introductions Posted: Jan 29, 2018 14:26 Subject: Re: Concrete as a mineral
Dale Hallmark Replies: 6 Views: 11066	I believe that is a Alkali-Aggregate Reaction (AAR). Depending on the type of aggregate there are other reactions that can occur, In siliceous aggregates, the reactions are called "alklali si ...
Topic: Wood completely Petrified in less than a year?
Dale Hallmark Replies: 21 Views: 32243	Forum: Off-Topic and Introductions Posted: Jul 10, 2017 08:15 Subject: Re: Wood completely Petrified in less than a year?
Dale Hallmark Replies: 21 Views: 32243	Unfortunate. In New Zealand massive Kauri wood is dug up from under farms and it is dated to 50 thousand plus years old with no sign of petrification. Makes for some very expensive conference tabl ...
Topic: Wood completely Petrified in less than a year?
Dale Hallmark Replies: 21 Views: 32243	Forum: Off-Topic and Introductions Posted: Jul 09, 2017 20:20 Subject: Re: Wood completely Petrified in less than a year?
Dale Hallmark Replies: 21 Views: 32243	In 2004, five Japanese scientists published examples of rapid petrification in Sedimentary Geology. The team of scientists, led by Hisatada Akahane, had analyzed a small lake in the explosion crater o ...
Topic: Wood completely Petrified in less than a year?
Dale Hallmark Replies: 21 Views: 32243	Forum: Off-Topic and Introductions Posted: Jul 09, 2017 18:16 Subject: Re: Wood completely Petrified in less than a year?
Dale Hallmark Replies: 21 Views: 32243	I remember a case we studied in one Geology or Hydrology class where fence posts were replaced and the old posts had been there for 20 or thirty years. The bottom part in the ground was petrified and ...
Topic: Collection of Dale Hallmark
Dale Hallmark Replies: 17 Views: 35763	Forum: Collection photos and Collector's page Posted: Jul 08, 2017 19:13 Subject: Re: Collection of Dale Hallmark
Dale Hallmark Replies: 17 Views: 35763	Got this today. It is Native Copper from Central Arizona USA. A friend who lives there sent it to me. He no longer remembers precisely where he harvested it. It weighs 95.74g. Dale
Topic: Struggling to identify the green mineral
Dale Hallmark Replies: 13 Views: 23030	Forum: Minerals and Mineralogy Posted: Jun 24, 2017 21:27 Subject: Re: Struggling to identify the green mineral
Dale Hallmark Replies: 13 Views: 23030	Green might be Serpentine? maybe. Dale
Topic: Struggling to identify the green mineral
Dale Hallmark Replies: 13 Views: 23030	Forum: Minerals and Mineralogy Posted: Jun 24, 2017 21:21 Subject: Re: Struggling to identify the green mineral
Dale Hallmark Replies: 13 Views: 23030	Looks like Marble to me instead of Limestone. Don't know what the Green stuff is but green is common in marbles. I don't recall seeing anything green In limestone's before but doesn't surprise me it c ...
Topic: Twenty basic minerals
Dale Hallmark Replies: 8 Views: 12104	Forum: Off-Topic and Introductions Posted: May 29, 2017 22:24 Subject: Re: Twenty basic minerals
Dale Hallmark Replies: 8 Views: 12104	I have about 125 in my have and want list. But mine is very customized to my interests. For instance I have maybe 20 different quartz's whose only difference is color. My collection is also weighted t ...