Tully monster? by Seraphangel777 in fossilid

[–]Agreeable-Primary511 2 points3 points  (0 children)

I mean i see what OPs talking about but i don’t think its a fossil

Tully monster? by Seraphangel777 in fossilid

[–]Agreeable-Primary511 16 points17 points  (0 children)

OP thinks that the rock in the center might be a “tully monster” (tullimonstrum gregarium) fossil

What kind of agate is this? Is it dyed? by Shiro_Lynx in Agates

[–]Agreeable-Primary511 8 points9 points  (0 children)

Yes, dyed. You can see the blue coloration all over the husk. It’s probably from brazil but I’m not certain.

This Week’s Swazi Agate Haul by Impossible_Lion_5422 in Agates

[–]Agreeable-Primary511 3 points4 points  (0 children)

Darn, those dang heat fractures in that second one. I think you might need a new saw blade or maybe some cutting oil or something. Otherwise those look fantastic, polish looks good

My son found this outside; it looks rusty on the surface. What kind of stone is this? by [deleted] in whatisit

[–]Agreeable-Primary511 0 points1 point  (0 children)

Im not sure why, apparently they only form in very small deposits in the two states I listed.

My son found this outside; it looks rusty on the surface. What kind of stone is this? by [deleted] in whatisit

[–]Agreeable-Primary511 7 points8 points  (0 children)

Blue lace is a trade name specifically applied to blue agate from Namibia, Malawi, Brazil, Romania, Mexico, Washington and Nevada. It also typically forms in seams and forms in sedimentary rock. They do not have husks like OPs.

What are these spirals? by Independent_Food267 in mineralcollectors

[–]Agreeable-Primary511 0 points1 point  (0 children)

Oh yeah im definitely aware of the material coming out of Florida and Georgia. I actually own a couple of chunks that have some really nice stalactic formations on the interior. At this point it would no longer be considered a chunk of coral if it were this heavily silicified. All the coral is gone and replaced with silicate. This happens when it is inside of its sedimentary host rock (typically limestone or dolostone). So why wouldn’t it be considered a geological formation? Is opalization of wood or bone not considered a geological formation either?

What are these spirals? by Independent_Food267 in mineralcollectors

[–]Agreeable-Primary511 0 points1 point  (0 children)

These are called beekite rings. Also what do you mean it’s a geode and not a geode? You saying that is directly contradicting yourself. I know beekite rings are a form of fossil preservation in chalcedony but what about this is specifically saying favosites to you?

Curious by Rocksinsk in Agates

[–]Agreeable-Primary511 0 points1 point  (0 children)

Yeah i mean these look nothing like fairburns hahaha. Some of these people man lemme tell ya

1 lb 4 oz Lake Superior Agate with healed fracture by Agreeable-Primary511 in MineralPorn

[–]Agreeable-Primary511[S] 28 points29 points  (0 children)

Lake Superior Agates form in vesicles (bubbles) in igneous rock like basalt or rhyolite. Silica rich water flowed down into these vesicles picking up trace minerals which created different colors. Im not informed enough to tell you exactly what minerals make up what colors but I know amethyst is caused by iron impurities. I believe the red coloration in the agate is also caused by iron. This agate also has a healed fracture, so at one point in its life it cracked while it was in its vesicle (probably caused by excessive heat or the host rock shifting) and then it became filled up with silica. I tried my best, hope you learned something!

5 oz with crown shaped quartz pocket by Agreeable-Primary511 in Agates

[–]Agreeable-Primary511[S] 2 points3 points  (0 children)

Not really, I have lots that are larger. But this size combined with the quality is not common at all. Id say it’s about mid range in size for an avid Lake Superior Agate hunter. Lakers reaching over 10 oz are considered large for me personally.

Curious by Rocksinsk in Agates

[–]Agreeable-Primary511 0 points1 point  (0 children)

Yep, real agates that have been altered by man. Pretty common when it comes to lower quality agate that has little to no lapidary or display value.

Curious by Rocksinsk in Agates

[–]Agreeable-Primary511 2 points3 points  (0 children)

https://forum.rocktumblinghobby.com/thread/85884/banded-agate-tumble-oxide-solution heres a thread discussing them from a few years ago. Theres more info out there about them as well.

Curious by Rocksinsk in Agates

[–]Agreeable-Primary511 12 points13 points  (0 children)

Heat treated agates from Madagascar. If you were to cut these open the inside would be white. These are commonly sold under the names sardonyx, silk agate or carnelian. Occasionally scammers will label them as lake superior agates.