Gems

Types of Gems
There are four types of Gems and they are ranked in terms of increasing rarity: This was part of the game's trivia to reflect the real life comparison that Diamonds actually do occur much more commonly than other coloured Gems. Although they are the hardest naturally occurring rock, owing to their strong carbon bonds, other coloured Gems should really get more mention!
 * 1) Diamond
 * 2) Emerald
 * 3) Ruby
 * 4) Sapphire

Usage of Gems
In BusyDwarf, Gems should not be confused with Coal which is rather worthless. Therefore the shop will only accept the four Gems when you purchase HeadStarts. Events scores are also only based on Gems collected. You are however, able to convert Coal to Gems in Caves and the EVIL WIZARD does require some Coal when he gives you a contract.

Gems and Abilities
The Gems also generate special abilities that reflect their nature. Diamond is hard, Emerald causes Chaos, Ruby burns through lesser rock and Sapphire cracks the molten rock.

How to Collect Gems
Gems are automatically collected whenever the light from your HeadLamp runs over them. You will notice the mini-gems flying to the top left corner of the screen if they are collected. If the yellow light is not showing on your screen, it may be disabled, you can enable that in options. Regardless of the light display, your Dwarf will still collect gems. Collecting Gems not only grows your collection, this action also heals your Dwarf. Therefore, a better HeadLamp is essential to survival.

Gem Crowns are a reward for completing a Danger Zone and they give 20-50 Gems as well as a guaranteed Gem Amplifier ability. They can contribute significantly to your Event Score.

Another way to obtain Gems is to use Caves. This tends to be much slower that picking up Gems from the tunnel, but don't underestimate the amount of Gems you can get from Caves over time.

Gem Bonus
Your Gem Bonus is shown on the bottom left of the screen and it starts out at 1x. Every 20 Power of your equipped HeadLamp you gain an extra multiplier. Every 50 Contracts also gives you an extra multiplier, so experience counts. Furthermore, you can activate Gem Amplifier (200%) by collecting all 4 Gems and Coal within the space of 3 seconds.

E.g. 22 Power HeadLamp, 52 Contracts : 1 + (22/20) + (52/50) = 3x Gem Bonus

E.g. 38 Power HeadLamp, 52 Contracts, Gem Amplifier : [1 + (38/20) + (52/50)] * 2 = 8x Gem Bonus

It should be noted that Gem Bonus does not equate to Gem Heal, only Gem Amplifier increases the amount of Health recovered from collecting Gems.



Collecting Danger Skulls
Danger Skulls are collected the same way as Gems, so sometimes it is an option to switch to a lesser HeadLamp if you want to avoid Danger Zones.