I think it would be lovely if we had to option to buy crystals in game!
They wouldn't need to serve a specific function, they could just be pretty things that could sit in our chests...
Crystals are canon, Neville uses an Amethyst pendant for protection, Fleur's tiara is adorned with diamonds, opal in the cursed necklace given to katie bell, pearls are used as potions ingredients and emeralds, sapphires and rubies are mentioned throughout. (Rubies in Godric Gryffindor's sword, Emeralds in the Slytherin house point sand timer thingy, Sapphires in Ravenclaws house point counter). I also think quartz should be available, as the crystal balls used in divination were traditionally made out of Quartz.
In Dervish and Banges, we already see diamond necklaces and a moonstone ring, why could we not purchase these along with individual crystals?
Please upvote this!
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