|
|
Post by scott on Feb 13, 2008 19:23:41 GMT -5
Any clue what the stuff is growing on the quartz crystals?  |
|
|
|
Post by arappaho on Feb 13, 2008 20:23:55 GMT -5
First guess would be druzy, Scott.
|
|
|
|
Post by lee on Feb 13, 2008 21:29:20 GMT -5
Can you give us some relative size of the specimen? It does look like a coating on one of the larger crystals; but the "growths" do look like druzy crystals being formed.
|
|
|
|
Post by scott on Feb 14, 2008 23:39:18 GMT -5
Here's a quarter for scale. Druzy certainly makes sense to me.  |
|
|
|
Post by dr00bie on Feb 19, 2008 12:00:07 GMT -5
But what was the druzy formed over? It looks to me like a pseudomorph... maybe after calcite rhombs?
Drew
|
|
|
|
Post by 41dave on Feb 19, 2008 13:27:35 GMT -5
my guess was calcite too. Not a complete rule it in or out test...but try fluorescence.
-dave
|
|
|
|
Post by scott on Feb 20, 2008 9:11:42 GMT -5
my guess was calcite too. Not a complete rule it in or out test...but try fluorescence. -dave Yeah I've yet to purchase a shortwave/longwave light but thats in the works. I'll have to bring it over to arappaho's place down the street from me, he has one. |
|
|
|
Post by scott on Feb 26, 2008 9:00:48 GMT -5
my guess was calcite too. Not a complete rule it in or out test...but try fluorescence. -dave Yeah I've yet to purchase a shortwave/longwave light but thats in the works. I'll have to bring it over to arappaho's place down the street from me, he has one. Well I took it over to arappaho's place and it did not fluoresce under long or shortwave. So if it were calcite then it's no longer there. So it must be just druzy quartz only at this point. |
|
|
|
Post by downeast on Mar 28, 2008 20:05:38 GMT -5
Firstly, there is no such mineral as "druzy". This is a morphology term. Any mineral can be potentially druzy. Secondly, a UV light may or may not work. Before you buy an expensive light, try some dilute (10%) hydrochloric acid (mutriatic acid is the same stuff but typically anywhere from 20-40% hydrochloric acid). If it fizzes, then there is a good chance that it is Calcite.
Downeast
|
|
