Red Beryl may not be required for any recipes in Coral Island, but you need some to complete Offerings and advance the story; here’s how to get one.

Due to its rarity, red beryl stones sell for as much as $10,000 per carat. The Ruby Violet mine, owned by Gemstone Mining, produces 5,000 to 7,000 carats a year.

TUCSON — In February, during one of the annual gem shows here, Ray Zajicek displayed a stone that was not for sale: a 32-carat hexagonal crystal of red beryl — or “red emerald,” as the ...