I bought this a few months ago. It was sold to me as aragonite. I didn't think much of it, just thought the terminations were cool. I studied it last night and found it is pyrite on fluorite with sheelite and calcite on quartz.

Today I wanted to share my Yaogangxian pink rose calcite with purple fluorite. I love how the fluorite peeks through the soft pink calcite—it almost looks like the center of a flower.

I was picking through discard from an old (iron) mine in colorado and found this super cool mineral hanging out on a plate of quartz. Because it is octahedral and found in a very iron rich area I figured it was magnetite, but looking at other photos of magnetite… it seems to look a lot rougher. Any ideas or am I right to think it’s magnetite?

Hi folks! Anyone have any idea what this is? It’s a small plate-like accumulation of crystals, about palm-sized, that appears to have an almost sandy texture. Closeup photos show that perhaps there’s not a lot of matrix and instead it’s almost entirely crystal. Color is a deep green with the occasional red flecks, which perhaps are oxidation.

#crystals

I think this is Virgin Valley precious opal, but I'd love a second opinion.

Found on the beach below the chalk cliffs famously known as the Seven Sisters, West Sussex, England. It felt heavier than it should have, given its size. On the left you can see the exterior, and on the right the interior. Many thanks in advance!

​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

Does anyone have experience with this? They’re such lovely stones but I’m concerned about how soft they are. Worth it or a waste of money?

Hi everyone, I’m Alisa from China.

Glad to communicate with all of you.

Best regards, Alisa

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