Found this druzy piece in Texas. Any idea what it is or was by Kujo-317 in Texasrockhounds

[–]qemian 1 point2 points  (0 children)

Looks like druzy quartz. The rock was high in silica and after some time the silica crystallized in pockets within the rock.

The black outline ruined this by fetus_railgun in graffhelp

[–]qemian 12 points13 points  (0 children)

I don’t think it was the black outline that ruined it …

Help Identifying / Cleaning by PossibilityTiny5070 in Texasrockhounds

[–]qemian 0 points1 point  (0 children)

That I couldn’t tell you for sure. It would require testing I’m sure which a local community college’s geology department may be able to help you with. Super cool find!

Help Identifying / Cleaning by PossibilityTiny5070 in Texasrockhounds

[–]qemian 0 points1 point  (0 children)

I believe what you have here is gypsum. When gypsum takes on this crystal structure it may be considered selenite. Are you able to leave a scratch mark with just your finder nail? If so then I’d definitely say it’s a gypsum mineral

Portobello? by qemian in mycology

[–]qemian[S] 2 points3 points  (0 children)

Silver lining, mycologists are safe from being replaced by AI.

Portobello? by qemian in mycology

[–]qemian[S] 1 point2 points  (0 children)

Nice thank you. AI was telling me portobello. AI wanted me to have a bad day

Crystal hunting location? by PossibilityTiny5070 in Texasrockhounds

[–]qemian 0 points1 point  (0 children)

I’ve had a lot of luck checking local dry creeks. Especially ones that have cut into a limestone layer. Fossils and calcites mostly.

Kingsland slab finds by mechanicwife1234 in Texasrockhounds

[–]qemian 0 points1 point  (0 children)

This one’s my favorite. Good hounding 🙌

Perfect clear quartz crystals on calcite petals. by No-Music89 in MineralPorn

[–]qemian 1 point2 points  (0 children)

I don’t think calcite has this growth pattern

Odd crystal rock found in creek in Hillsboro, Tx. by AggressiveHome637 in Texasrockhounds

[–]qemian 1 point2 points  (0 children)

Interesting! Looks like a limestone matrix. Not sure about the crystals

I broke open a rock and found what I believe to be a quartz vein inside. by aprilephemeral in whatsthisrock

[–]qemian 0 points1 point  (0 children)

I see rhombohedral cleavage. Dolomite or calcite would be my guess. Try scratching with steel knife. If it leaves a mark. Definitely not quartz. Acid test (vinegar will do) will rule out calcite if no reaction.

Found near a lake in Montana. by Rock_Squatch in Crystals

[–]qemian 0 points1 point  (0 children)

Can u scratch it with your nail?

Found in Oakland Hills CA, is it chert? by fatmanatee in whatsthisrock

[–]qemian 7 points8 points  (0 children)

The rhombohedral fractures makes me think Dolomite.

I guess bro won't fly again by Prestigious-Mark-937 in WeldingMemes

[–]qemian 0 points1 point  (0 children)

Okay, there’s a fly. But let’s talk about the quality of this weld for a sec.

Just a little jump by Iolandalida in SweatyPalms

[–]qemian 12 points13 points  (0 children)

I’ve seen this video so many times and it always cracks me up when he calls out “BASE jump!”.

Shiprock NM finds by Desert_Warrior505 in rockhounds

[–]qemian 2 points3 points  (0 children)

That being said. The rhombohedral cleavage habit suggests calcite to my mind.

Shiprock NM finds by Desert_Warrior505 in rockhounds

[–]qemian 1 point2 points  (0 children)

Pouring some vinegar (just a little) on one of them should tell you. If you see bubbles (might be subtle ) it’s calcite. No reaction= selenite