By Cerberus.Jeffil 2016-05-24 07:08:43
Yes. Random random random.
Here's the rundown for armor.
1) Pellucid stones force at least one attack, accuracy, or att/acc roll and raises the cap to +35 for each. You still have a chance at another attack and another accuracy roll as well, but if those extra rolls put the attack or accuracy over 35, then that roll is dropped.
The distribution is completely random. You are just as likely to get acc +1 as you are to get acc+35.
2) Fern stones force a special stat augment, such as double attack, store TP, critical hit rate, etc. depending on the armor, and also increase the cap by 1 (for example, the most triple attack you can get with taupe or pellucid is +3, but with Fern +4 is possible). Odyssean has a wide pool of possibilities here - more than Herculean. Herculean has store tp, triple attack, critical hit rate, critical hit damage, weapon skill damage to name the ones I remember.
The distribution here is weighted on the lower side. The type you get has an equal chance, but the actual amount is more likely to be +1 or +2. It takes a lot of stones to get augments on the higher side.
3) Taupe stones force an attribute augment and raise the cap to +15. Again depending on the armor and type of augment you select will decide which stats are more likely.
No matter what stone you use, here's the types of "rolls" that can occur (BG says about 60% chance of any particular roll being applied)
1) Attack, Accuracy, or att/acc (forced with Pellucid)
2) Attribute (+1 to +10) (forced with taupe, up to +15)
3) Special stat (range varies based on stat) (forced with Fern, cap raised by 1)
4) More attack
5) More accuracy
The result of the above is what you see all 10,000 times you throw a stone at Reisen equipment - and you will throw a lot of them before you get something you like.