Minerals are the main resource in StarCraft. Harvesters mine 5 minerals per trip - eventually depleting the mineral fields. A standard expansion has 8 mineral patches, consisting of 4 large nodes with 1800 minerals per patch and 4 small nodes with 900 minerals per patch, for a total of 10,800 minerals per base. This can be verified by clicking on an untouched mineral patch.
A worker occupies a mineral field for 1.99 seconds at Fastest speed (2.786 seconds at Normal speed). It then pauses for approximately 0.3571 seconds at Fastest speed (exactly 0.5 seconds at Normal speed) before returning at full speed; The next worker can already begin operations during the pause. This applies to Rich Mineral Fields as well as MULEs, too. Provided no MULEs are involved, a fully saturated mineral line can therefore mine no more than 60sec / 1.99sec * 5 minerals * 8 (mineral fields) = 1206.03 minerals mined from 8 mineral patches in one minute. However, due to workers commuting between mineral fields in search for one that is not occupied, this ideal number is never reached. See below for actual Mining Rates. With two workers per mineral patch, a large node with 1800 minerals will exhaust after 15 minutes, whilst a small node with 900 minerals will exhaust in 7.5 minutes.
Rich Mineral Fields
Some maps will contain bases with yellow colored Rich Mineral Fields, which allow workers to carry 7 minerals per trip instead of 5. A gold base usually has only 6 mineral fields instead of 8. Rich mineral field lines still usually contain 1500 minerals, meaning they generally mine out faster than standard bases. An ideal, fully saturated rich mineral line can therefore mine no more than 60sec / 1.99sec * 7 minerals * 6 (mineral fields) = 1266.33 minerals per minute.
The Terran MULE is a temporary unit that mines 30 minerals per trip on both standard and High-Yield patches. Additionally, MULEs are not hindered by regular workers mining the same patch.(they will conflict with other MULEs) A MULE mines about the same rate as three SCVs.
Vespene Gas can be harvested from Vespene Geysers. However, a specific building must be built on top of each geyser before mining is possible. The buildings are: the Refinery for Terran, the Extractor for Zerg and the Assimilator for Protoss. Harvesters gather 4 gas per trip. They have to spend 1.415 seconds at Fastest speed (1.981 seconds at Normal speed) in them before returning at full speed. A single, ideal and fully saturated geyser can therefore procure no more than 60sec / 1.415sec * 4 gas = 169.61 gas per minute.
A standard vespene geyser contains 2250 gas and will exhaust after 13.25 minutes of saturated extraction.
A standard base contains a total of 10,800 minerals and 4500 gas in a 12:5 ratio (2.4 minerals per gas, or 0.416 gas per mineral)
Rich Vespene Geysers
These only differ from 'regular' geysers in that Harvesters gather 8 gas per trip. Rich Geyser bases usually contain only 1 Rich Geyser, as opposed to the 2 for standard bases.
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- One worker on one mineral field harvests 55-65 minerals per game minute, depending on distance.
- Two workers on one mineral field harvest 110-130 minerals per game minute, depending on distance.
- Three workers on one mineral field harvest 150 minerals per game minute, regardless of distance. Note that if the workers are constantly moving to different mineral fields in the line then they won't get the full 150, but instead may get ~143 minerals per minute.
- For rich mineral fields, simply multiply these numbers by 1.4 (7/5).
- One worker on a geyser harvests 96-122 gas per game minute, depending on distance.
- Two workers on a geyser harvest 194-244 gas per game minute, depending on distance.
- Three workers on a geyser harvest 293-330 gas per game minute, depending on distance. In the case of far-diagonal gas placement you will need 4 workers for full saturation.
- At 2 workers/mineral and 3 workers/gas, a base with 8 mineral fields and 2 vespene geysers will harvest ~1050 minerals and ~330 gas per minute.
- An over-saturated base with 8 minerals will harvest ~1200 minerals per minute.
- At 2 workers/mineral, a yellow base with 6 rich mineral fields will harvest ~1100 minerals per game minute.
- An over-saturated yellow base with 6 rich mineral fields will harvest ~1260 minerals per game minute.
Starting locations in Starcraft II contain several mineral patches and two vespene geysers, all of which can deplete during play. Depleted mineral patches will simply disappear and Vespene Geysers will yield no gas and your gas mining building will glow red.
Players can create and defend additional bases known as Expansions throughout the game to secure more resources, while at the same time attempting to stop enemy players from doing the same. In Starcraft II, map control is usually synonymous with resource control.
The production of almost every unit requires an additional resource: Supply. The amount of supply can be increased by the building of certain buildings or units.
- For Terran, Supply is increased by building Supply Depots (+8), Command Centers (+15) and Calldown: Extra Supplies (+8).
- For Protoss, Supply is increased by building Pylons (+8) and Nexuses (+15).
- For Zerg, Supply is increased by producing Overlords (+8) and building Hatcheries (+6).
Building either of these will increase the amount of supply a player is able to spend. The maximum amount of food for any player is 200. Due to the inefficiency of building Command Centers, Hatcheries or Nexi for supply, these should never be built for this purpose only.
The term "Supply Block" or "being supplyblocked" usually means "18/18" or "36/36" Supply (e.g. "92/92", "134/134", "182/182" and so on). If you are not able to build a unit, because you have reached your maximum Supply, would be a more general definition. Some might argue, you are even supplyblocked if you want to build a Zealot, but you can't, because your Supply is at "17/18". You would be able to build a Probe, though.
Note: Supply is sometimes called Psi for the Protoss and Control for the Zerg. Another general term for supply is Food.