This is a pure bismuth crystal. The heaviest element that is not radioactive (ok technically it is but it’s half life is like 9 orders of magnitude older than the universe so it really doesn’t count.) Probably my favourite crystal structure, even if you forget the colour. Surprisingly, bismuth is also super-not-toxic. You can actually eat the stuff and it’s often in indigestion remedies. Fascinating element, all round.
Chalcedony is one of the world`s oldest gemstones. According to archaeologists, humanoids have worn stones, ivory, bone, and certain organic items for personal adornment for about 75,000 years. Which shows its power. Chalcedony prevents from touchiness and melancholy. Worn by many to promote calm and peace. Chalcedony also stimulates creativity. Which is mostly used by astrologers.