Nice result there! I found one similar in the UK and it turns out it is Norwegian Larvikite, also with Mica Biotite I think (not 100% sure). Yours is a bit different but I would guess it is in the Feldspar family.
Basically an undercut is a dent or gouge on the surface of the finished stone. A lot of stones, like this one here, are made up of different types of minerals, and each one has a different hardness. So when you grind away at the stone the softer materials get cut away faster than the harder stuff. That causes the surface to have little dents in it...those are the undercuts. Sometimes you can have three or more different hardness's of materials and it makes you want to pull your hair out because you keep polishing the thing and wonder why it still looks like a satin finish so you look at the thing under magnification and the stone looks like a mutated golf ball with four different depths of dents in it. GAWD! So with that long winded explanation, an undercut is a dent in the stone caused by different material grinding away faster because of its hardness. Thank you for asking questions, and if you have any others please don't hesitate to ask. Thanks for watching too.
It may be...but making a definite determination is really difficult when it coms out of a bag landscape rocks. AND makes it more fun! Thanks for watching.
I been watching lots of gemstone videos and holly crap. There’s like a million. They go by hardness the way they fracture and all kinds of other crap. I’m still trying to find out what I have found.
@@Algoldprospecting It really is a giant rabbit hole trying to identify a piece like this..especially when it is comprised of what looks like multiple materials. I think Ill just call it ''blackNshiny-ite''
Nice result there! I found one similar in the UK and it turns out it is Norwegian Larvikite, also with Mica Biotite I think (not 100% sure). Yours is a bit different but I would guess it is in the Feldspar family.
Looks like schist. I have alot of it. It's beautiful.
Did you ever identify this stone? I just found one!
I have many of that shiny black stone .very big like a mango,
That would be lovely I'm sure.
Thanks for watching.
Black daimond
Just started polishing one that looks the same..
What did you use in polishing the stone?
SIR GOOD IDEA KEEP IT UP
Thanks for watching!
I try for new ideas every day...or at least every other day.
What's an undercut?
Basically an undercut is a dent or gouge on the surface of the finished stone.
A lot of stones, like this one here, are made up of different types of minerals, and each one has a different hardness. So when you grind away at the stone the softer materials get cut away faster than the harder stuff. That causes the surface to have little dents in it...those are the undercuts.
Sometimes you can have three or more different hardness's of materials and it makes you want to pull your hair out because you keep polishing the thing and wonder why it still looks like a satin finish so you look at the thing under magnification and the stone looks like a mutated golf ball with four different depths of dents in it. GAWD!
So with that long winded explanation, an undercut is a dent in the stone caused by different material grinding away faster because of its hardness.
Thank you for asking questions, and if you have any others please don't hesitate to ask. Thanks for watching too.
I feel your pain
Looks like black diamond
It sort of does...though it is WAY softer than diamond.
I wouldn't mind have a few pounds of this stuff though...that's for sure.
Thanks for watching!
@@sandandshoreshoppe I have one like this, been thinking I'm keeping black diamond 😮
It’s black diamond. Your rich
Oh man!!! I wus rich and didnt even know it!
Had I known I would have bought 4 packs of ramen noodles yesterday.
Mega million
I have a black diamond weighing 258gm
We have also like that,big and small whos want to buy.. just see it
It would be nice to have more of this stuff.
Thanks for watching.
i have the same
Looks like marcasite.
It may be...but making a definite determination is really difficult when it coms out of a bag landscape rocks. AND makes it more fun!
Thanks for watching.
No idea really
Me either...
I been watching lots of gemstone videos and holly crap. There’s like a million. They go by hardness the way they fracture and all kinds of other crap. I’m still trying to find out what I have found.
I think I have found the same. An ya google lens canteen find any thing that's the same.
@@Algoldprospecting It really is a giant rabbit hole trying to identify a piece like this..especially when it is comprised of what looks like multiple materials.
I think Ill just call it ''blackNshiny-ite''
@@sandandshoreshoppe good idea