Aye that is one of the larger issues with mining for granite.
The old random number generator, will give us a zillion plain granite, yet even the other so called LOW END colors, like the shadow only come up like one shadow granite rock for every zillion of plain white. It gets even WORSE for mining up valorite granite...which is my Miranda's own fav. granite color of tables and chairs.
And I think Shadow is also a favorite of many a player. Whenever I DO manage to mine up 18 shadow granite rocks, make a couple tables for my vendor poof they are GONE ! And then folks wonder why we may price them at 4.5 a shadow table or 6-7k for a valorite one, add in the HOURS it took to be lucky to even get 9 granite of same color for ONE table beyond plain granite rocks...well time is money too rarer than mining up...even val. ore some days. We oft get the ore color more often, and the game slaps us with plain granite even when we hit a true shadow ore or valorite ore vein, yet more oft the granite lands in our pack.....plain !
I will probably be taking down my stone mason vendors too, just due to the mining issue, of never or seldom getting the other colors we all need more of to make a 9 stone table (1) table let alone several of any one color other than plain ol granite ones. The randomness of mining for hours to get even a few granite the same colors to make anything like a table 6-9 dep. on sizes makes it pure laborious of hours of mining to keep em restocked with any regularity, at all per color, so most of us hang it up.
It would also be nice if the dev. team put a mining option on our shovels to ONLY get granite, not the ORE along with it...when all we want are granite stones not a ton of ore we do not want at all boggin us down .... when mining for, wanting just granite.
Shadow tables would display assorted colors bells probably the best though, etc. the issue will be regardless of how many hours we mine, we may only get 4 shadow rocks compared to 44444 + plain ones in any given hour/s.