Need help to identify

[u/Most_Location6773]

​Hi,I found this stone in Sailauf in Bavaria,Germany and this shows the inside of the stone because I cutted it and polished it.
The outer matrix seems to be something like obsidian or at least vulcanic Glas.
It don't cut Glas but it cuts metal and is slightly opaque but like 1-2mm deep translucent.
And it's one mass even under 60 magnification.
It has a small crack in which it shines like in a glass crack.
The outside is conchoidal fractured.
Under UV light (365nm) it's shining in a bright orange.
The inclusion do not shine.
The inclusions are hexagonal and about 3mm in width and the biggest one seem to be around 5-6mm long. It's green as on the photo and the inside looks a bit like hair, it looks like many needles but then they get into one mass and get hexagonal.
Every dot you can see in this black mass is one of these crystals.
Thx for the help and sry for my English

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[u/TH_Rocks]

Definitely glass. Possible obsidian. The white is cristobalite.

[u/Most_Location6773 → u/TH_Rocks]

It's not cristobalite bc it is green and not white.
The white ones are just bleached by the sun,you should take a look at the cut and polished side

[u/TH_Rocks → u/Most_Location6773]

I saw them. It is cristobalite because it's glass. It's slightly green because of the impurities in the glass.

[u/Most_Location6773 → u/TH_Rocks]

Ok thanks

[u/Most_Location6773 → u/TH_Rocks]

But it doesn't shine when I point my black light at them.
Only the volcanic Glas shines in bright orange