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Need two positive ID's please!


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So recent finds at a thrift store.

A jasper stromatolite kamba slab. (or so I think) And it was wasted and made into a silly christmas tree. What throws me off is it doesnt have any circles like stromatolite structures would. Although there are the right colors and a little swirliness

And a very large quartz crystal (or so I think). Clearly much damage to the point itself which is why I cant say forsure it is quartz. I originally thought it could be halite but then it wouldnt have points. The only test i can think of is that it scratched glass easily.

 

Thanks all for any help.

 

 

jasper1.jpg

jasper2.jpg

jasper3.jpg

jasper4.jpg

quartz1.jpg

quartz2.jpg

quartz3.jpg

quartz4.jpg

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51 minutes ago, Haderly said:

I would not wager a guess on the first one without a close up picture in nature light. The second one is a quartz crystal. 

Okay I will take one tomorrow during the daylight :). Any guesses on what it could be be compared instead of jasper stromato if not? (even if no picture)

Thanks for the pos id on the quartz

Edited by Flaak
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could be a serpentine if you can scratch it with a knife. It does not look like any stromatolite that I am familiar with and certainly not like the kambaba that I have. 

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Second is certainly quartz. I’d wager the first is serpentine. It does not have the appearance of a stromatolite. 

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18 hours ago, Haderly said:

could be a serpentine if you can scratch it with a knife. It does not look like any stromatolite that I am familiar with and certainly not like the kambaba that I have. 

 

18 hours ago, d_day said:

Second is certainly quartz. I’d wager the first is serpentine. It does not have the appearance of a stromatolite. 

It seems dark for serpentine but its definitely a good suspect to the list. Here is a close up picture .

Let me know if they're fine

23342.jpg

123213.jpg

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A few notes on Kambaba “jasper.” It’s not actually a jasper, nor is it a stromatolite. It’s actually rhyolite. 
 

I also just remembered there is a very similar looking stone to what you have there. It was being sold by a few of the vendors at Quartzsite a few years ago. I think they were calling it dragon stone, but I don’t remember for certain. It was quite soft. 

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"Rhyolite is a rock (a silica rich volcanic rock) It can be a lava flow, volcanic ash or an obsidian that has devitrified (glass broken down into minerals). When it gets silicified, it can be termed a jasper - focusing on a term that makes it salable, or "ocean jasper" or some other glitzy term put on it by retailers"

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31 minutes ago, BMc said:

"Rhyolite is a rock (a silica rich volcanic rock) It can be a lava flow, volcanic ash or an obsidian that has devitrified (glass broken down into minerals). When it gets silicified, it can be termed a jasper - focusing on a term that makes it salable, or "ocean jasper" or some other glitzy term put on it by retailers"

I have always used the term "rhyolite" as any light colored volcanic. Basalt as any dark volcanic

Jasper as a cryptocrystalline sub class of rhyolite.

And then there is the rhyolite that is macrocrystalline and fused. Im not sure of the term. It is high silica fused rhyolite with a coarser crystal structure than jasper. It polishes well but it is not as hard and tough as jasper. 

I have always just called it "rhyolite" for lack of a more specific term. But that is also the term for rocks that vary pretty widely in appearance.

I don't think I have ever seen a deep green rhyolite before. If I have I did not realize it was rhyolite.

 

 

 

 

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Pic represent what I used to call Rhyolite.  I know for a fact that it is a Rhyolite, and that it has small garnets embedded in it. But I now know that what I have been calling Rhyolite is not exclusive of the term nor of the color.  

RHYOLITE.PNG

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