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日本語Mine gems
Without this research a castle produces no gems at all. The first level starts production, and every further level raises the castle's gem production by 10%, up to level 20. Every castle produces its own kind of gem – diamonds, rubies or emeralds – and gem stars on the castle's field increase the yield further. Requirements: Laboratory 20, Mine 5 and Storehouse 30.
The gems are stored in the Treasury. You need them for deeds of conquest, for healing wounded troops, for the construction wagon – and to turn them into gold (see Gems).
Philosopher's stone
With the Philosopher's stone you turn gems into gold in the Treasury of your main castle. Every level lets you convert one more gold per month – so at level 30, the maximum, up to 30 gold per month. You can only research it in your main castle; it requires at least one level of Mine gems and Laboratory 30.
Mine gems
Every level raises the gem production of this castle by 10 %.
| Level | Stone | Wood | Ore | Research time | Total bonus |
|---|---|---|---|---|---|
| 1 | 15,000 | 15,000 | 15,000 | 59 min 14 s | +10 % |
| 2 | 115,000 | 115,000 | 115,000 | 1 h 58 min | +20 % |
| 3 | 265,000 | 265,000 | 265,000 | 2 h 57 min | +30 % |
| 4 | 465,000 | 465,000 | 465,000 | 3 h 56 min | +40 % |
| 5 | 715,000 | 715,000 | 715,000 | 4 h 56 min | +50 % |
| 6 | 1,015,000 | 1,015,000 | 1,015,000 | 5 h 55 min | +60 % |
| 7 | 1,365,000 | 1,365,000 | 1,365,000 | 6 h 54 min | +70 % |
| 8 | 1,765,000 | 1,765,000 | 1,765,000 | 7 h 53 min | +80 % |
| 9 | 2,215,000 | 2,215,000 | 2,215,000 | 8 h 53 min | +90 % |
| 10 | 2,715,000 | 2,715,000 | 2,715,000 | 9 h 52 min | +100 % |
| 11 | 3,265,000 | 3,265,000 | 3,265,000 | 10 h 51 min | +110 % |
| 12 | 3,865,000 | 3,865,000 | 3,865,000 | 11 h 50 min | +120 % |
| 13 | 4,515,000 | 4,515,000 | 4,515,000 | 12 h 50 min | +130 % |
| 14 | 5,215,000 | 5,215,000 | 5,215,000 | 13 h 49 min | +140 % |
| 15 | 5,965,000 | 5,965,000 | 5,965,000 | 14 h 48 min | +150 % |
| 16 | 6,765,000 | 6,765,000 | 6,765,000 | 15 h 47 min | +160 % |
| 17 | 7,615,000 | 7,615,000 | 7,615,000 | 16 h 46 min | +170 % |
| 18 | 8,515,000 | 8,515,000 | 8,515,000 | 17 h 46 min | +180 % |
| 19 | 9,465,000 | 9,465,000 | 9,465,000 | 18 h 45 min | +190 % |
| 20 | 10,465,000 | 10,465,000 | 10,465,000 | 19 h 44 min | +200 % |
Philosopher's stone
Every level lets you convert gems into one more gold per month. Can only be researched in your main castle.
| Level | Stone | Wood | Ore | Research time | Total bonus |
|---|---|---|---|---|---|
| 1 | 25,000 | 25,000 | 25,000 | 47 min 35 s | +1 |
| 2 | 79,500 | 79,500 | 79,500 | 1 h 35 min | +2 |
| 3 | 161,250 | 161,250 | 161,250 | 2 h 22 min | +3 |
| 4 | 270,250 | 270,250 | 270,250 | 3 h 10 min | +4 |
| 5 | 406,500 | 406,500 | 406,500 | 3 h 57 min | +5 |
| 6 | 570,000 | 570,000 | 570,000 | 4 h 45 min | +6 |
| 7 | 760,750 | 760,750 | 760,750 | 5 h 33 min | +7 |
| 8 | 978,750 | 978,750 | 978,750 | 6 h 20 min | +8 |
| 9 | 1,224,000 | 1,224,000 | 1,224,000 | 7 h 8 min | +9 |
| 10 | 1,496,500 | 1,496,500 | 1,496,500 | 7 h 55 min | +10 |
| 11 | 1,796,250 | 1,796,250 | 1,796,250 | 8 h 43 min | +11 |
| 12 | 2,123,250 | 2,123,250 | 2,123,250 | 9 h 31 min | +12 |
| 13 | 2,477,500 | 2,477,500 | 2,477,500 | 10 h 18 min | +13 |
| 14 | 2,859,000 | 2,859,000 | 2,859,000 | 11 h 6 min | +14 |
| 15 | 3,267,750 | 3,267,750 | 3,267,750 | 11 h 53 min | +15 |
| 16 | 3,703,750 | 3,703,750 | 3,703,750 | 12 h 41 min | +16 |
| 17 | 4,167,000 | 4,167,000 | 4,167,000 | 13 h 29 min | +17 |
| 18 | 4,657,500 | 4,657,500 | 4,657,500 | 14 h 16 min | +18 |
| 19 | 5,175,250 | 5,175,250 | 5,175,250 | 15 h 4 min | +19 |
| 20 | 5,720,250 | 5,720,250 | 5,720,250 | 15 h 51 min | +20 |
| 21 | 6,292,500 | 6,292,500 | 6,292,500 | 16 h 39 min | +21 |
| 22 | 6,892,000 | 6,892,000 | 6,892,000 | 17 h 27 min | +22 |
| 23 | 7,518,750 | 7,518,750 | 7,518,750 | 18 h 14 min | +23 |
| 24 | 8,172,750 | 8,172,750 | 8,172,750 | 19 h 2 min | +24 |
| 25 | 8,854,000 | 8,854,000 | 8,854,000 | 19 h 49 min | +25 |
| 26 | 9,562,500 | 9,562,500 | 9,562,500 | 20 h 37 min | +26 |
| 27 | 10,298,250 | 10,298,250 | 10,298,250 | 21 h 24 min | +27 |
| 28 | 11,061,250 | 11,061,250 | 11,061,250 | 22 h 12 min | +28 |
| 29 | 11,851,500 | 11,851,500 | 11,851,500 | 23 h | +29 |
| 30 | 12,669,000 | 12,669,000 | 12,669,000 | 23 h 47 min | +30 |