Just a few more ores I noticed are missing, and suggested rarity:

Low

• 'c:ores/dark_gem'
• 'c:ores/lignite_coal'

Medium

• 'c:ores/bauxite'
• 'c:ores/antimony'

High

• 'c:ores/monazite'
• 'c:ores/titanium'
• 'c:ores/tungsten'