Talk:Indigonium/@comment-34769722-20181031143242/@comment-444327-20181031160701

I see where you're coming from. If you look at this example of Tourmaline then look at the in-game render there are some physical similarities. However from what I've seen, there is a wide colour spectrum for Tourmaline and it can be translucent. Indigonium is exclusively purple, and is opaque. It's also hard to tell whether Indigonium is actually a gemstone, since its Slimepedia entry and tagline suggests it's an ore. But it does seem to have some reflection to it, so it might well be and it comes bundled with other minerals, similarly to Tourmaline.

I've done a little digging (pun not intended) and I believe the stone itself may physically be based on Sugilite, a rare purple crystal which seems to always be opaque. Although as far as I can tell it doesn't have any industrial application, mostly jewellery and crystal healing mumbo jumbo.