Extracting from your own sample
Facts checked 1 Nov 2026
You've found your own samples. Now put them to work, and gather everything the rest of the Training Ground needs: the raw materials for one warehouse.
What you need to extract
The courses ahead turn raw materials into the Cement, Steel Beams, and Steel Sheets for one warehouse. Between them, they need about:
- Olivine: 8,900 tonnes.
- Carbon Dioxide: 5,400 tonnes: 3,800 for weathering, and 1,600 for making Oxygen and Carbon Monoxide at the same time. About 2,800 tonnes come back later, which you can sell.
- Water: a little over 1,000 tonnes.
- Calcite: 270 tonnes.
That's more Olivine than most single samples hold, so you'll need two or three Olivine samples, plus one or two for each of the others. Use the samples your crew already holds, ones you buy, and the ones you've taken yourself.
Extract from your own sample
It works just as in Your first extraction: select the lot's extractor, click Extract Resource, choose your sample and your crew's warehouse, and start with Lease & Extract. As the sample is your crew's own, there's nothing to buy.
- Improve First: If you mean to improve a sample, do it before you extract. Once you've taken a tonne, it can't be improved.
- Stop at Three Quarters: The last quarter of a sample takes as long as the first three quarters together. Taking three quarters of two samples is usually quicker than emptying one.
- Run Several at Once: Start an extraction, and while your crew is back and free, start another on a different extractor. Olivine and Carbon Dioxide side by side is a good way to begin.
Keep track
Check your warehouse as the materials come in, and click Finish Extraction on each job when it's done, so nothing is left waiting in an extractor. The Extracting course page shows what your crew has extracted since your hire began.
Once you have your Olivine and Carbon Dioxide, you're ready for Refining. The Water and Calcite can keep extracting in the background while you start.