Today I was reading the beginning of Accel World from Reki Kawahara. I cannot find the meaning of the word 石上 in the dictionary.
仮想黒板の石上に、黄色い手紙マークが点滅した。
My translation attempt
On the virtual blackboard … a yellow letter symbol flashed.
I tried different dictionaries, however sadly no positive result. Maybe a name?
On the stone of the virtual blackboard, a yellow letter symbol flashed.
上に = on the surface of
石上に – 石の上に
仮想黒板の石 – the stone of the virtual blackboard
Are you sure it was 石上 and not 右上？ That seems to make more sense.
“A yellow letter symbol flashed on the upper right hand corner of the virtual blackboard”
You’re right I missread the Kanji. What a stupid mistake 
.
Thank you pts and Jeremy for your help.