Curious formation inside solid quartz geode

[Spooky]

Hi everyone, new member here in hopes one of you could dissuade me from thinking this looks an awful lot like a calcified mushroom inside solid quartz.  Is something like that even possible? It looks like it cracked and took the cap with one half and the stem with the other. I know the pictures are lackluster but upon close inspection, the "cap" section certainly looks to have gills. The material in question does look to be different than the surrounding quartz, in a scratchy, rough, calcium like texture, and the quartz is growing in a ring starting at the edges of both curious points. 

 

Possiblity or pareidolia? Thanks in advance!! 

 

Edited September 26 by Spooky

[Fossildude19]

It's not a mushroom.

[Rockwood]

Looks like a solid that the crystals nucleated on. Conceivably a fossil itself, but I can't identify it as such.  

[Coco]

On the 3rd photo we can see that the "hole" is located at the base of a cluster of crystals that have developed around. The "base" of each crystal, so to speak, converges towards this hole. In addition, it is white with powdery appearance, as if it were quartz powder due to the opening of the geode. In other words, either the opening has uncovered a dissolved area of the base of these quartzes, or there was a small pebble at this location and the opening has caused it to leave.

 

In my opinion, it is only mineral, here a priori quartz. I do not see a fossil in a geode where the crystals have grown.

 

Coco

[Spooky]

Thanks for all the input and info folks, much appreciated! 

[minnbuckeye]

I have had the pleasure of collecting hundreds of Keokuk geodes. Many look very similar to the one you posted, almost solid with a thick, crystally, presumably quartz. But often there is a central area different from the quartz, which is often a whiter, more powdery material. I found this except of an article explaining Keokuk geodes:

 

 

Mineralogically the geodes are almost invariably siliceous. The siliceous types are characterized, without exception, by an outer shell of chalcedony a:nd this is usually followed by crystalline quartz, but calcite sometimes succeeds the chalcedony. In some instances, however, the interior is lined with botryoidal chalcedony and no crystalline calcite nor quartz appears.  The quartz geodes are often solid, but when they are hollow the quartz crystals ~f the interior may be studded with crystals of calcite, dolomite, ankerite, sphalerite, pyrite, or magnetite, and occasionally they are stained with the powder of limonite .. or hematite. Sometimes an incrustation of aragonite or gypsum is found. Moreover, hollow siliceous geodes from the vicinity of Niota. Ill., are often filled with a black bitumen, and those from the more shaly portions of the Upper Keokuk, particularly at Keokuk, Ia., and Warsaw, Ill., commonly contain kaolin in the form of a fiocculent white powder.

 

To me, the mushroom looks very similar to the Kaolin frequently found in my geodes. Sometimes this kaolin is "solid", other times it is powder. Incidentally, this kaolin was used by Cleopatra to preserve her complexion!

[Coco]

3 hours ago, minnbuckeye said:

Incidentally, this kaolin was used by Cleopatra to preserve her complexion!

 

Ah ? I thought it was thanks to the milk of anesse (donkey female) !

 

Coco

Edited Monday at 02:58 PM by Coco