Intriguing aged rocks. Jewelry tray or can use2mak

I wish I still had the papers for these but hopefully some rock scientist is a rocket scientist for aged rocks;) I wanna say the deep one with that beautiful glisten to the inside is amethyst but don't mark my words. The flat one is soo smooth to the touch.rough around edges.swirly designs. Like a mini coaster or jewelry tray. Or u can make into jewelery. amazes me they r natural rocks. These were abt $55/pair. Listed price includes both. These r my FAV. .Free SHIPPING(on me) ON ANY ORDER 100+