The Guess the Gem answer is topaz!! It can be naturally blue, as well as other colours, but there are artificial methods to get blue too. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎

The Guess the Gem answer is topaz!! It can be naturally blue, as well as other colours, but there are artificial methods to get blue too. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎
Guess the Gem time!! What mineral do you think these gems are? Hint: the blue colour is from irradiation on the left and cobalt diffusion on the right. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎
The Guess the Gem answer is olivine!! It’s a mineral group that has the mineral species forsterite and fayalite. The gem variety is peridot. #GuessTheGem #GeoscienceBluesky ⚒️🧪💎
Another Mineral Cup Guess the Gem!! What mineral or group do you think these gems are? Hint: it’s the first winner. #GuessTheGem #GeoscienceBluesky #MinCup26 ⚒️🧪💎
The Guess the Gem answer is andalusite!! It’s a mineral that has the variety chiastolite that has inclusions that form a cross. #GuessTheGem #GeoscienceBluesky #MinCup26 ⚒️🧪💎
A Mineral Cup Guess the Gem!! What mineral do you think these gems are? Hint: it’s a very recent Mineral Cup challenger. #GuessTheGem #GeoscienceBluesky #MinCup26 ⚒️🧪💎