Before checking what certain Banu Stone grants you please read the lore about it.

'Run for your life'
You run 2 times faster then normal. Not a good choice with short range gems

'Lightening your steps lightens your burdens'
This inscription grants you almost instant gem recharge time for a price of always jumping when touching the ground.
All around useful blessing, but stay cautious, landing hits might be a bit harder (Apart from using Wolf Cherry Gem, which targets the closest enemy)

'Steel your precision'
This inscription allows you to have twice the slots for gems for a price of your health.
One of the most useful blessings

'Knowledge is bestowed upon the brave'
Based on developer's comment it increases the appearance of libraries at the expense of shops.

'Cherish what you've given; what is lost may not return'
One of the most powerful blessings. Grants you twice your health(for this run) , that can only be replenished after end of each sections from heart pedestals. That means no hearts will be dropped from chests/enemies on death etc. Works for Hard Mode (You have 2 HP instead of 1)

'The planets call for you'
Neat and useful effect.
Players gravity is altered to moonlike. What it means is higher jumps and slower falling for player.

'The cost of wealth is time'
Each coin pickup is worth incredibly much more, however delay between recharging your gems is significantly increased. Not recommended, since money later on is useless and waiting for recharge can cost you your dear life.