Calda Toroid drops from enemies near or inside Enrichment Lab.
Sola Toroid drops from enemies near or inside Temple of Profit.
Vega Toroid drops from enemies near or inside Spaceport.
Toroids are rare drops you can find in caves or from any enemy at certain locations on the Orb Vallis, notably: How to Farm Toroids (Vega, Sola and Calda) Mining all the resources required for Garuda should take an hour or less. However, it’s safer to exit through the gate if you find a resource you desperately need (or a Toroid). The mission progress screen shown after you return to Fortuna won’t show any items under mission rewards, but you’ll find all ores and gems there if you check your inventory. Once you’ve mined all the veins in the area, you can hit escape and exit to Fortuna while retaining all your ores and gems (if you get a Toroid, DON’T abort mission – It will not award you the Toroid). We’ve noticed a few times where veins have gone high up on ceilings so be watchful for that if you are close to a vein and can’t seem to find it. There is a Toroid spawn close to this entrance that you cannot miss if it spawns so keep an eye out for that while hunting down veins. We usually enter the cave through the entrance near the northwestern wall of Transit Depot (on outside). This area has had a high concentration of mining veins and is relatively enemy light. The cave northwest of Transit Depot is one of the best, if not the best, mining spots in all of the Orb Vallis