Here are important gemstones & crystals, their traditional uses, and trusted websites where you can learn more.

Value crystals for spiritual or cultural reasons, there is no strong scientific evidence that crystals have healing powers.

GIA (Gemological Institute of America) – The foremost authority on gemstones worldwide.
Evashu Crystal Glossary – Guide to crystal meanings and beginner-friendly information.
Mind and Stone Crystal Guide – Education on crystals and their care.
Life & More Crystal Guide – Information for beginners on crystals.
American Museum of Natural History – Gems & Minerals – Educational materials on minerals and gemstones.