I'm not sure if this is the right place to ask but here goes! 
I have acquired some pieces of wood I'm almost positive are Spalted Maple. (Sorry, meant to take a picture of them before I left the house this morning.)
They came from a tree in my mom's yard that she thought was a Black Walnut. The tree is roughly 20-25 years old and she had one of the bigger limbs, 20-24 inches diameter or so at thickest, cut off and was cut in to about 24 inch chunks. They've been sitting in her yard and I had no idea what kind of wood it was till she asked me to take a look at them and if I wanted them. To my surprise when I split a couple I saw that it was Spalted Maple I believe. (I'll try and post a picture this evening when I get home if that helps.)
So here's my questions The few already cut pieces have been sitting in the yard for about a year, so they're somewhat seasoned, but because we live in the Northwest, they have sat in the rain for periods of time for sure. I've had them out of the rain for a couple weeks though now. I have an 1 1/2" slab that I've cut out of one to confirm the species and could theoretically use it for a number of knife scales, but I'm wondering how long it should sit before use.
In addition, the rounds and half rounds I have, should I cut them up into particular sizes and store for a certain length of time? And is there a recommended way to cut them for stability or grain orientation?
And when the rest of the tree comes down any recommendations on what size to cut them, how to store them, how long to store them before use, etc...?
Again, the wider pieces are about 20-24" diameter, as they narrow down is there a size where the grain is not as desirable? I've only cut the two pieces so far because I didn't want to butcher too many of them.
The wood isn't impressively hard and it's whiter than I would have expected for Black Walnut so I'm guessing they'll need stabilizing? When I was in boat building, two of the boats we finished had what I was told was Black Walnut but it was all a deep brown throughout as opposed to what I've got so I'm kind of confused.
At the boat yard, I wasn't in the cabinet/finish shop so most of my work was the installation of items made by the cabinet shop so I've never done much work with specific wood species in regards to finishing so know very little about working with/identifying specific woods as well as finishing them in addition to working with steel, so I'm learning a lot right now which is fun!
Thanks!

I have acquired some pieces of wood I'm almost positive are Spalted Maple. (Sorry, meant to take a picture of them before I left the house this morning.)
They came from a tree in my mom's yard that she thought was a Black Walnut. The tree is roughly 20-25 years old and she had one of the bigger limbs, 20-24 inches diameter or so at thickest, cut off and was cut in to about 24 inch chunks. They've been sitting in her yard and I had no idea what kind of wood it was till she asked me to take a look at them and if I wanted them. To my surprise when I split a couple I saw that it was Spalted Maple I believe. (I'll try and post a picture this evening when I get home if that helps.)
So here's my questions The few already cut pieces have been sitting in the yard for about a year, so they're somewhat seasoned, but because we live in the Northwest, they have sat in the rain for periods of time for sure. I've had them out of the rain for a couple weeks though now. I have an 1 1/2" slab that I've cut out of one to confirm the species and could theoretically use it for a number of knife scales, but I'm wondering how long it should sit before use.
In addition, the rounds and half rounds I have, should I cut them up into particular sizes and store for a certain length of time? And is there a recommended way to cut them for stability or grain orientation?
And when the rest of the tree comes down any recommendations on what size to cut them, how to store them, how long to store them before use, etc...?
Again, the wider pieces are about 20-24" diameter, as they narrow down is there a size where the grain is not as desirable? I've only cut the two pieces so far because I didn't want to butcher too many of them.
The wood isn't impressively hard and it's whiter than I would have expected for Black Walnut so I'm guessing they'll need stabilizing? When I was in boat building, two of the boats we finished had what I was told was Black Walnut but it was all a deep brown throughout as opposed to what I've got so I'm kind of confused.
At the boat yard, I wasn't in the cabinet/finish shop so most of my work was the installation of items made by the cabinet shop so I've never done much work with specific wood species in regards to finishing so know very little about working with/identifying specific woods as well as finishing them in addition to working with steel, so I'm learning a lot right now which is fun!
Thanks!