I concur.
Ruby, Sapphire, Topaz and Peridot I find very beautiful. Diamonds are neat, and I think the appeal of them is just the refraction of light (hence the shining rainbow effect) + hive mind.
Like, even Obsidian is beautiful and comes in colors other than black, and it doesn’t get the same love.
You walk into a castle and forget why you came here and your whole life.