What are the Oculi crafting recipes?

Solution 1:

Everything is auto-positioned by dot. Diamond's line style changed for higher contrast.

All reactions are one way and downwards. I've hidden the directional arrows because they are ugly and do not add any information once you know everything is one-way.

Solution 2:

I'm working on a full write up here, but in order to not be a link spammer...

Any three of the same oculi will give you a single one of the next tier better (Rough -> Tumbled -> Faceted -> Brilliant).

You can combine different colors of the same tier to get a single oculi of a different color of the same tier:

• Ruby + Sapphire = Amethyst
• Sapphire + Emerald = Tourmaline
• Ruby + Emerald = Citrine
• Sapphire + Ruby + Emerald = Diamond

From there, you can combine some of those into yet another type:

• Amethyst + Citrine + Tourmaline = Onyx

And then finally you can do one more combination:

• Diamond + Onyx = Spinel

I'm still working on gathering up all the different effects. Each of those types have three possible effects (depending on the slot you put them in), and the effects both amplify and can be slightly different between tiers.