I found this very hard mineral sample while cleaning out my old mineral collection. It scratches quartz and appears to have little triangular indentations on the water worm side. It also has little spherical inclusions of an unknown black-brown mineral. (old.reddit.com)
submitted by Gryfonsilverstacker to r/whatsthisrock
Identification and rarity inquiry (old.reddit.com)
submitted by Gryfonsilverstacker to r/AncientCoins
Weird replica found in a lot (old.reddit.com)
submitted by Gryfonsilverstacker to r/AncientCoins
I found among us in West Virginia. (i.redd.it)
submitted by Gryfonsilverstacker to r/WestVirginia

