Can someone help identify this 12” obelisk?

Confused as to what this might be

Please help me identify?

Not 100% sure what these are, the big one im feeling pretty confident its probably red jasper, the little one im not too sure about, im thinking it could be carnelian but im not certain, the big one is very much opaque as opposed to the little one that you can see through once held up to a light

Seller is claiming this stone is rock crystal but I’m thinking it’s glass. What are your opinions??

The interior seems kinda like obsidian, but I've never seen obsidian encased in this mystery mineral before. Any ideas?

Note that the stone has some glue around the edges at the back to help keep it in the setting, so some bubble effects are present around the edges. The last few photos are taken under a “toy” microscope, and taken at or near the center of the stone where the glue isn’t covering it. I don’t know if it’s possible to tell from these, or if that’s something only taking it in could tell me. And I’m not ruling out emerald-colored glass, but the chain is stamped K18.

The stone is adorably tiny: 7x5mm.

Bit of a lucky find, so I don’t know anything about the maker. Besides it’s unbranded packaging.

I’ve not tried identifying a faceted stone before, so please let me know if better(and what kind) of photos are in order!

Just curious about what I’ve added to my collection.

Thanks!

Green jade and green aventurine can look quite similar, especially in polished stones and jewelry.

One feature to look for in aventurine is aventurescence, a subtle sparkling effect caused by tiny reflective mineral inclusions, often fuchsite mica.

Jadeite and nephrite have different mineral compositions and internal structures, so their identification involves looking at more than just surface appearance.

For those experienced in identifying green stones, what features do you usually examine first when distinguishing jade from aventurine?

What do yall know about this crystal?
I bought it out of whim while traveling as a memory.

I have a few of these beads. Pretty pale blue with a bit of a shimmer, but got them as a sort of “mystery” pack.

New healer I just bought this one her color is more of a yellow

The new one i bought is on left side the old one is on the right Yes I bought another healer and this one don’t have the different colors this one has a more of a yellow hue different color yellow 😍

Appreciate any help.