Gem drop rate

[bj1997]

Hi everybody !
I'm asking me a few questions about gem drop rate.

Is it the same for each element ?
Does the rarity of the gem has any influence on it's drop rate ?
What about the black gem ?
Does knights increase black gem drop rate ?

If I have enough informations i'll create a document where i summarize these datas.

Thanks a lot,
Bj1997

[Librax]

To your first question: I think yes

To your last question: For every guild member that has 15+ knights, the chance of finding black gems increases by 1%. So if all members have 15+ knights, you can have up to 50% chance

[Wasi]

what i think how it is handled ....

without any black gems:
we have 20% for each colour.

After that we have a 33% chance to get a size ....

So here to get a big green for example you have a chance of 1/5 * 1/3 = 1/15 = 6,67%

If we go into the black gems:
Getting a big black is 16,67% because of its first choice. 50% black or colour.
Getting now a big green is only 1/30 = 3,33% so half of before.