A bit about gemstones

Just a note about gemstones, all ether has a gemstone associated with it, and each stone will have a type, and a maximum capacity.  The type you can think of as kind of a purity but it may also be because of the size of the gemstone.  For example, you might have a large poor quality stone, or a small fine stone that could be potentially of the same energy level.  Thus I have decided to use a somewhat arbitrary letter rating for the type of gemstone, and a number that follows that indicates the natural maximum of the stone.

Better types of gemstones can be potentially overcharged and hold an additional amount of ether.

I won't be sharing the table for all players, though I will go a bit more in depth for anyone who has the gem cutting study.  But I will give you a couple of examples:

R is the lowest type of gem and there really is no limit to the second characteristic but  1-2 would be fairly common types of gem, 3-4 would be very nice gems, 5-6 would be exceptional, 7+ would be unique.

With this being said, lets take for example the gem you found a Jade that is o3.  This is of the quality "o" (one above R).  Jade is associate with Symbol ether, and when this gem is fully charged it will hold 3 symbol ether.

Gems regain ether naturally on their own without any player intervention; they check for ether recovery after 1 hour, if this check succeeds, it has one ether that can be used.  If it fails, it will not check again until the next sunrise.  It will continue checking each sunrise UNTIL it has 1 ether, after which it will check again every 5 days to see if it has accumulated a second ether, then every 5 days to see if it recovered a 3rd ether.

This slow recovery might lead the characters to the thought of trying to hurry things along.  This can be done but it comes at some risk to the stone.  Each type of gemstone will have a durability rating, brand new Jade has a durability rating of 30.  Anytime a character has an extra symbol ether summoned and would like to put it into the jade they would have to roll based on a table to store the ether.  In this case lets use the example of the jade with 2 charges but can take a 3rd.  For an "O" type stone a player with an extra symbol ether would have to make a DC17 Ether Manipulation; Disband Ether check.  Any failure would result in 1 point of damage to the stone.  Should 30 points of damage accumulate to the stone, it will lose one letter rating (becoming in this case an R type), and one power level (in this case becoming 2).  So this stone would become an R2 when its durability reaches 0, then that durability is reset.  Incidentally once the stone is at the R level, when it loses durability it loses 2 of its power, so an R2 or R2 would be destroyed, while an R3 would become an R2.

Some types of stones can be overcharged.  An "O" type can be overcharged one level (holding in the case of an o3 stone, a maximum of 6 charges).  This type of action is harder to do, and also more potentially damaging to the stone.  Let’s take the example of the jade o3.  Should you find yourself with 3 extra symbol ethers and want to put them into the stone, you need to put them in ONE AT A TIME.  The DC for this stone would be DC28 to add one charge (DC25 base +1/current charge).  Any failure does 2 points to the stone, and if you fail by 10 or more, you do 2+d4(the die for jade).  If you fail, you must make a control slippery ether check at the same DC or lose that ether.

Before you think that overcharging and such is impossible, there are some types of stones out there that can be overcharged at least one level with roll being automatically successful, and overcharging to 4x their capacity for as little as a dc13 check.  These of course are the most precious and useful items to a Caster.