Guess the rock...

stephan
still telling self it's just a hobby

Member since March 2015
Posts: 4,559

Guess the rock... Apr 3, 2015 15:54:53 GMT -5

Quote

Post by stephan on Apr 3, 2015 15:54:53 GMT -5

Let's play "guess the rock," and see who can figure this one out. I'll leave it open for a week, or so. After that, I'll spill the beans. the windowed section should help.

www.flickr.com/photos/36618387@N06/16835783940/
www.flickr.com/photos/36618387@N06/16837207789/

Hint: other examples of this mineral are posted in my photostream...

- Stephan

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"Conversation should be more like ping-pong, and less like archery.” — Alan Alda
"The good thing about science is that it’s true whether or not you believe in it.” — Neil DeGrasse Tyson

captbob no longer being taken for granite St. Pete FL Member since December 2007 Posts: 8,186	Guess the rock... Apr 3, 2015 16:48:19 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by captbob on Apr 3, 2015 16:48:19 GMT -5 Green Aventurine
	Dogs are unlimited lines of joyful credit with a payment that comes due all at once.

stephan still telling self it's just a hobby Member since March 2015 Posts: 4,559	Guess the rock... Apr 3, 2015 22:25:11 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by stephan on Apr 3, 2015 22:25:11 GMT -5 Not quite, but like aventurine, it is often used as a jade simulant.
	- Stephan -------------------------------------------------- "Conversation should be more like ping-pong, and less like archery.” — Alan Alda "The good thing about science is that it’s true whether or not you believe in it.” — Neil DeGrasse Tyson

Rockoonz misunderstood rock expert Member since August 2009 Posts: 11,484	Guess the rock... Apr 4, 2015 0:40:10 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Rockoonz on Apr 4, 2015 0:40:10 GMT -5 Mariposite
	“You preachers of equality, the tyrannomania of impotence clamors thus out of you for equality: your most secret ambitions to be tyrants thus shroud themselves in words of virtue. Aggrieved conceit, repressed envy—perhaps the conceit and envy of your fathers—erupt from you as a flame and as the frenzy of revenge.” —Friedrich Nietzsche

Joe spending too much on rocks Member since July 2014 Posts: 274	Guess the rock... Apr 4, 2015 7:28:22 GMT -5 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Joe on Apr 4, 2015 7:28:22 GMT -5 Serpentine?

jamesp Cave Dweller Member since October 2012 Posts: 36,612	Guess the rock... Apr 4, 2015 9:25:11 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by jamesp on Apr 4, 2015 9:25:11 GMT -5 Quartzite ?

Pat misunderstood rock expert Member since February 2012 Posts: 11,835	Guess the rock... Apr 4, 2015 9:36:23 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Pat on Apr 4, 2015 9:36:23 GMT -5 Looks like soapstone, though solid green soapstone is new to me.
	Pat

Fossilman Cave Dweller Member since January 2009 Posts: 20,723	Guess the rock... Apr 4, 2015 9:47:52 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by Fossilman on Apr 4, 2015 9:47:52 GMT -5 Washington Jade.............
	God,family and life.....

gingerkid has started giving rock gifts 2x HOTY, Wise Dan, by Metro Member since July 2011 Posts: 3,779	Guess the rock... Apr 4, 2015 13:13:40 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by gingerkid on Apr 4, 2015 13:13:40 GMT -5 Two Raccoon Jasper? Just kidding, stephan, but saw them in your pics. Just sayin...
	~ Jan ~ It's all about AttiTude... "...you gotta know your ABC's... Always. Be. Cool." - Boyd Crowder

gingerkid has started giving rock gifts 2x HOTY, Wise Dan, by Metro Member since July 2011 Posts: 3,779	Guess the rock... Apr 4, 2015 13:20:30 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by gingerkid on Apr 4, 2015 13:20:30 GMT -5 Chrysoprase??
	~ Jan ~ It's all about AttiTude... "...you gotta know your ABC's... Always. Be. Cool." - Boyd Crowder

bobby1 has started giving rock gifts Member since November 2007 Posts: 3,007	Guess the rock... Apr 4, 2015 13:29:53 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by bobby1 on Apr 4, 2015 13:29:53 GMT -5 Either Happy Camp "Jade" (Idocrase) or Pulga "Jade" again Idocrase. I'm leaning more toward the Pulga material. Bob

stephan still telling self it's just a hobby Member since March 2015 Posts: 4,559	Guess the rock... Apr 4, 2015 13:32:19 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by stephan on Apr 4, 2015 13:32:19 GMT -5 Many good guesses. Another hint: it is formed by contact metamorphism, and has a hardness and S.G. that can make it quite a convincing fake.
	- Stephan -------------------------------------------------- "Conversation should be more like ping-pong, and less like archery.” — Alan Alda "The good thing about science is that it’s true whether or not you believe in it.” — Neil DeGrasse Tyson

gingerkid has started giving rock gifts 2x HOTY, Wise Dan, by Metro Member since July 2011 Posts: 3,779	Guess the rock... Apr 4, 2015 13:34:54 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by gingerkid on Apr 4, 2015 13:34:54 GMT -5 Variscite?
	~ Jan ~ It's all about AttiTude... "...you gotta know your ABC's... Always. Be. Cool." - Boyd Crowder

gingerkid has started giving rock gifts 2x HOTY, Wise Dan, by Metro Member since July 2011 Posts: 3,779	Guess the rock... Apr 4, 2015 13:39:51 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by gingerkid on Apr 4, 2015 13:39:51 GMT -5 Hydrogrossular garnet sometimes called Transvaal Jade?
	~ Jan ~ It's all about AttiTude... "...you gotta know your ABC's... Always. Be. Cool." - Boyd Crowder

gingerkid has started giving rock gifts 2x HOTY, Wise Dan, by Metro Member since July 2011 Posts: 3,779	Guess the rock... Apr 4, 2015 14:03:45 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by gingerkid on Apr 4, 2015 14:03:45 GMT -5 One I'm not familiar with... Is it Saussurite, stephan?
	~ Jan ~ It's all about AttiTude... "...you gotta know your ABC's... Always. Be. Cool." - Boyd Crowder

stephan
still telling self it's just a hobby

Member since March 2015
Posts: 4,559

Guess the rock... Apr 4, 2015 17:29:35 GMT -5 gingerkid likes this

Quote

Post by stephan on Apr 4, 2015 17:29:35 GMT -5

Apr 4, 2015 13:29:53 GMT -5 bobby1 said:

Either Happy Camp "Jade" (Idocrase) or Pulga "Jade" again Idocrase. I'm leaning more toward the Pulga material.
Bob

Oops. I scrolled right over this one. Ding, ding, ding.... Absolutely correct. Pulga "jade," California "jade," Californite, Vesuvianite, Idocrase....

It is a Sorosilicate with the chemical formula Ca₁₀(Mg, Fe)₂Al₄(SiO₄)₅(Si₂O₇)₂(OH,F)₄ as opposed to the nephrite is is sometimes sold as, which is a sodium-aluminum silicate: Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂. And it is dense. Its specific gravity is closer to jadeite.

You get bragging rights.

This is how it cabs up:
www.flickr.com/photos/36618387@N06/5033659208/
www.flickr.com/photos/36618387@N06/4831124282/ (the color balance is slightly off on this one)
www.flickr.com/photos/36618387@N06/4830513693/

Last Edit: Apr 4, 2015 17:32:12 GMT -5 by stephan

- Stephan

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"Conversation should be more like ping-pong, and less like archery.” — Alan Alda
"The good thing about science is that it’s true whether or not you believe in it.” — Neil DeGrasse Tyson

washingtonrocks has rocks in the head Member since January 2014 Posts: 521	Guess the rock... Apr 5, 2015 13:21:16 GMT -5 Pat and spiritstone like this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by washingtonrocks on Apr 5, 2015 13:21:16 GMT -5 That's some nice stuff, stephan. I especially like the shape of this one.