First of all, the 60% chance to upgrade gem is a lie and is really more like 20% chance. Its blizzard’s subtle way of trolling the player base.
Second, the base number of gem upgrades should be increased from 3 to 5.
Third, Empower greater rift should give a extra 2 gem upgrades.
Fourth, Finishing a greater rift with more than 5 minutes remaining should grant another gem upgrade.
Fifth, Finishing a greater rift with more than 10 minutes remaining should grant another gem upgrade.
Wrong. 60% is 60%. On how many attempts do you base your claim? You need to do thousands of attempts at certain percentage, record both successes and fails, and then calculate the real success rate. When you have large enough sample size (which is thousand at bare minimum, preferably more), you’ll eventually see that 60% chance is really 60%.
The short term variance can easily skew your perception and without large enough sample size make you think something is wrong.
We always get bogged down in this stupid argument. 60% is in fact 60%. The reason you think it’s not is a combination of confirmation bias and a completely crap mechanic.
The real problem is when you accomplish something it would be nice to get the reward you earned for the work you put into it. This RNG garbage is far too prevalent in Diablo 3. It doesn’t help the player to enjoy the game to fight your way to a new Grift tier and whiff your gem upgrade repeatedly. Because of the randomness it’s just as likely to walk away with zero upgrades as five. Stupid Design. If you mean the average to be three upgrades out of five just give three upgrades and be done with it.
Buffs, buffs, and even more buffs, does it ever end. D3 has been buffed into oblivion, bring on D4.
99% or even 01% … it could technically argued that you can really only validate the correctness of the number generator with an infinite number of roll. Or, for human approximation, say at least a million rolls…
All of that to say, there is no way t know for anyone if their percentage is accurate…
Beside, odds are they use a standard library number generator (not encryption strength mind you) so you can always become a famous mathematician & IT researcher and debunk or improve current number generator Maths, if you like.
However you will get 0 traction on a mere gaming forum…
Just go straight for the jugular and right after what you really want. You want to click a button once and have your gems be max level after crushing a GR1.
Conspiracy theory.
Blizz should migrate this thread from old forums and make it sticky: Diablo 3 Forums
Why not 500?
Why not 200?
There are no build-defining properties unlocked on Legendary Gems above rank 25, and this rank is easy enough to reach with the current system. All higher ranks are a part of endgame grind, which isn’t something that is in dire need to be easier.
I am a fairly sure statistic and probabilities are high school level mathematics.
Is education failing?
Education failed many many years ago once the government was infiltrated by apologists and left wingers pandering to minorities…
Thats why in schools they teach numeracy not mathematics.
Numeracy? What’s that?!
Are not Asians best as a demographic in Mathematics? Or so they not count as minority.
I am a firm believer that you must never lower the standards whatever the reasons. Improve the students.
It’s a tough world out there. The Chinese and Indians are not lowering their standards. If we do, we lose out in the end.
The “thresholds” of RNG are extremely noticeable and things often look different with just a several % differences, for example
IF your “hit chance” is 75% it procs almost all the time (it’s hard to roll 1/4 to miss), BUT if it gets down to something like 69% THEN you suddenly start missing a f*ckton (69% = one bit higher than 2/3, which acts just like 2/3 most of the time, even consecutive misses start happening at this rate) and so on
It gets EVEN WORSE when things get down toward 50% cause the chance of higher consecutive misses rises really noticeably compared to 66%… Sure, over thousand iterations the difference would “thin out” but again = The chance to miss consecutively on each round with 50% is MUCH HIGHER than on 66% and is MUCH HIGHER than 75% and THAT is how “random” works = each round for itself (i.e. no history)
Not just gem generation, it’s the way things work really
No.
Yes!
You can thank these in the USA…
Sorry, but there are supposed to be standards and those that don’t achieve those standards are supposed to fail. Not everyone succeeds. If you fail, get better. Do not ask for the standards to be lowered.
I hit 5 60% in a row the other night. Then 1 out of 3 next gr. To says its 20 % is rediculous. Cant remeber the last time it failed 3 out of 3
I failed 5 out of 5 @ 90%. 
And I’ve done 2 out of 5 @ 1% before.
They could make the upgrade chance a 100% right up to the GR level you are at and then let the chance drop off after that.
… or it could be next season theme: double upgrade chance on everything.