Mining experience is gained from miners or machinery when they mine an ore. After researching the 3rd mining perk you can open geodes for extra xp. Later in the game, you can send a mining train to obtain rare ores for 500k oil, which grants 1 million mining xp.
Mining Machinery[]
At the start, the player can buy miners in the Game shop as the first digger. Gradually, higher level machines will be available to craft and use. The ore from mining are used to sell to the shop for money.
Generally, higher tier machines just mine ores slightly better than lower tier ones, but this is not scaled to the amount of oil being used. Therefore running more lower machines tend to be more efficient for oil use.
You can also get Titanium from Cave Bags with a very rare chance (1/300). We suspect that machinery and uses for this will be implemented in the future.
Geodes[]
Geodes are found with mining machinery, different machinery find different geodes.
Machinery
Geode
Material
XP
Time
Price to open
Lime Quartz (Common)
Fluorite (Uncommon)
Topaz (Rare)
5,000
20,000
50,000
1:00
7:00
30:00
100,000
Blue Marble (Common)
Sulfer (Uncommon)
Purple Quartz (Rare)
15,000
50,000
150,000
2:00
15:00
1:00:00
2,000,000
Limonite (Common)
Crystal Prisme (Uncommon)
Clear Marble (Rare)
30,000
150,000
300,000
5:00
30:00
1:35:00
25,000,000
Dense Marble (Common)
Jade (Uncommon)
Opal (Rare)
50,000
300,000
1,000,000
15:00
1:00:00
2:00:00
200,000,000
Amethyst (Common)
Tashmarine (Uncommon)
Tanzanite (Rare)
120,000
500,000
1,200,000
35:00
2:00:00
4:20:00
1,000,000,000
Sea Crystal (Common)
Amber (Uncommon)
Smooth Pearl (Rare)
200,000
1,000,000
2,400,000
2:00:00
4:00:00
7:00:00
50,000,000,000
Geodes can be turned into minerals.
Price is the price for opening the geode.
XP is the experience player get by identifying mineral opened from geode.
Get Research#Mining lv6 ASAP to get "25% chance to get two minerals instead of one".