Minerals

💎Tourmaline

Tourmaline Group

Complex boron silicate minerals that come in virtually every color. Some crystals show multiple colors in a single specimen (watermelon tourmaline).

💡Tourmaline can generate an electric charge when heated (pyroelectricity) — this was first discovered in 1880.

3 minerals

Can you guess minerals from their family tree?

GuessKin Minerals is a daily taxonomy puzzle — Wordle meets the tree of life.