No, I don't think it's 6v.
It's 10 uF , it's Tantalum. The K in 6K may be short for +/- 10% or the whole "6K" may code for a voltage rating, I can't tell for sure.
Be careful because the mark there at the top of the image is the POSITIVE side of the capacitor, contrary to how electrolytic capacitors are marked.
Also be careful of the voltage rating, because if the circuit voltage is higher than what this tantalum capacitor can support, it can explode or burn with actual flames, unlike electrolytics which more or less just pop up and make smoke.
Some SMD components use that way of writing where the last digit is the number of zeroes .. ex 101 = 100 uF . You may also see something like 2R2 which is 2.2 ohm, another way of writing stuff (because dot may be too small to see)