This stone isn't in the fanciest area of the Rural Cemetery; it's in the same North Ridge section as the penitentiary and Female Guardian Society lots (the latter was an organization which looked after impoverished women, unwed mothers, and other "friendless" females).
It's a nice stone of dark granite, a stone which became popular for cemetery monuments because of its durability compared to marble and sandstone. But the simple design of the stone and its location aren't what make it special; it's the inscription carved into the curved top. It reads JAMIE'S MAMMA.
There's a little information on Sarah Kate Farmer. She was born in England, as was her husband Thomas R. Farmer. In 1880, the census lists them here in Albany. He was employed as a clerk in a drygoods store, she was a "keeping house" with one son - the Jamie mentioned on the stone. There was also a servant in the household, a young girl named Mamie Deck. Since the stone mentions an infant son, it's possible Sarah died during or shortly after giving birth to Arthur. The cemetery burial records don't list Thomas or Jamie here. Jamie was born in 1873 and he ould have been about twelve when his mother was buried here.