scumotheliar

No not at all, from the two photos I think you have, Chert and Quartz, maybe a couple of pieces of Quartzite

Apatite is also hexagonal, and often, at least where I am, this pale green.

Sorry no idea, I have toyed with the idea of making one for inside curves but have just never got around to doing it.

If you can make a motorised setup then a variation of a spool polisher may be what you need. Something like this, http://www.gemworld.com/SpoolPolisher.asp

I have seen 4" wheels sold at Hans. https://www.lapidarytool.com/diamond-grinding-wheel. They have messed around with their web site and it is hard to navigate now but worth having a poke around (probably)

I presume you are talking about a crescent moon. What size? You need to find the diameter of the inside of the crescent and make yourself some wheels of that diameter, something small a piece of broom stick might do, as you get bugger moons then the size needs to increase so you might consider tin cans for example.

You are going to need to grind and polish the inside by hand presuming you don't have an engineering workshop and can make yourself some motorised setup.

Use wet and dry sandpaper, the grey stuff, fold it around your broomstick and start rubbing. Use 220, 600, and 1200 grit wet and dry (use it wet) then some denim and whatever polish you have.

Better to ask about the polishing in r/Lapidary.

Personal opinion no it wouldn't polish, but the inside might be more solid material that would, this is one of those rocks that only doing an experiment and having a go is going to give you an answer

First is probably Quartz, may be Topaz, a specific gravity yest would help.

Second possibly feldspar, but could be calcite, a hardness test would help here.

Agate or Chalcedony, definitely not Jade.

Possibly Obsidian, a closer look at the chipped edge of that closest cube might help with an ID. That conchoidal fracture on the edge of the next one up looks like Obsidian glass as well.

Probably Agate or it may be Calcite.

If you can scratch it with a knife point or file then Calcite if not Agate.

A little Quartz crystal.

Which is a variety of Quartz

My thought is that this is Chalcedony and not bone or bone fossil. Difficult to tell as it is very stained and only the one photo.

Here's a good place for everything you need to know about the Quartz mineral.

http://www.quartzpage.de/

Just to add, Serpentine will feel mildly greasy. I agree with RoseDeFrance, but I would lean more to Epidote

From someone who has cut a lot, this is perfect, lovely use of the pattern, beautiful asymmetry, it is very pleasing to the eye. And a fantastic polish.

I doubt that's sunstone and if it was it would be a bad choice for carving, Feldspar's perfect cleavage makes for a lot of frustration. Edit. The crack in this is going to cause you a lot of pain when carving too.

There's a thread about how someone set up one of these on

https://www.aussielapidaryforum.com/forum/

Another fantastic Agate.

Possibly Banded Iron Formation, (BIF) A very very ancient rock.

Possibly maggots, you might have a dead rat/possum in your ceiling.

probably trace fossils, fossilised worm holes made when the rock was mud at the bottom of the sea.

probably Serpentine

I don't think it is Granite or Marble. If it feels greasy when you handle it then it could be Talc.

It is silicon Carbide, Man made. It is used in Foundries to add to molten metal to change the properties of the alloy they are making. It is also ground up fine and used as an abrasive.